【RIDE SAFE & RIDE FREE】Stay fully aware of what's happening behind you! This smart bike radar tail light offers a 120°wide-angle detection, tracking vehicles up to 165 yards away. Within 55 yards, it even pinpoints whether cars are on the left, center, or right behind you, and shows the exact distance of the nearest vehicle. The bike radar paired with the DARVISO app, you’ll get instant visual and audio alerts for approaching traffic—and even a calming voice notification when the road is clear
【SMART BIKE BRAKE LIGHT & AUTO BRIGHTNESS ADJUSTMENT】 Ride confidently with built-in brake sensing technology in bike light with radar that automatically activates a high-intensity brake warning when you stop suddenly. Plus, the intelligent brightness adjustment feature softens the beam as objects approach within 55 yards, preventing harsh glare for other cyclists or pedestrians (can be enabled in the APP settings)
【RADAR TAILLIGHT ALERT MODE】Within Bluetooth range, our bike lights feature a built-in radar alert that instantly sends a sound alarm and vibration alerts to your phone via the DARVISO app if your bike radar detects vibration, so you can check immediately. Simultaneously, the rear bike light will immediately trigger a powerful cross-flash light to deter others' actions. Providing extra protection and confidence even when you’re not around your bike for a short time
【6 MODES & LONG BATTERY】 With 6 lighting modes—Day Flash, Night Flash, Single Radar, Group, Constant On(up to 1 mile visible), and Breathing—this bright bike light delivers up to 75 lumens in Night Flash mode for superior visibility. As LED tail lights, they ensure you're seen clearly on rural highways, city streets, or moonlit park trails. Keep your ride going longer with a bike tail light rechargeable design—offering up to 16 hours of runtime with just 2 hours of USB-C charging
【WIDE COMPATIBILITY & SMART CONNECTIVITY】Our bike rear light is fully compatible with major bike computers. Plus, bike taillights enjoy effortless auto-connect: after the initial connection, your bike tail light will automatically reconnect every time, saving you from repeating the setup. And rearview bike radar with regular firmware updates keeps your device current, offering improved performance and a seamless, worry-free cycling experience
【FLEXIBLE MOUNTING & COMPLETE ACCESSORIES】 Install easily with two mounting options: bicycle seat post or Aluminum Alloy road bike saddle, fitting most bicycles. The package includes: radar tail light (3.47 × 1.58 × 0.87 in, 0.16 lb), USB-C charging cable, carabiner, lanyard, storage bag, L-shaped hex tool, and user manual—everything you need for commuting, city, group riding, or road cycling
【PREMIUM CHIP & IP67 DESIGN】 Built with cutting-edge American chip technology and designed by an international expert team, these bike accessories combine a sleek, modern look with reliable, high-performance functionality. With IP67-rated dustproof and waterproof protection, no need to worry about rain, splashes, dust, or full submersion. These bike lights for night riding perform flawlessly in harsh outdoor environments, from city streets to rugged trails
letmepicyou –
Works with my Bryton computer.
I have a Bryton cycling computer (750E, a bit dated, I know, but it works great) and got this hoping it would work with it, and lo and behold it does! All I had to do was go into the ‘add sensor’ bit and I found it right away, and it paired right up without complaint or problem.I LOVE it when things go smoothly and I don’t need to spend any time troubleshooting or guessing.There’s a lot I like about this radar / taillight, but first I’d like to hit on the one thing I don’t like, just to get it out of the way. It has a mount that is similar to the “Garmin” style mount, which is the de facto industry standard. However, it’s a bit smaller and not compatible with the Garmin style mount, it’s kind of its own unique thing. While I appreciate wanting to be different, I also appreciate a bit of standardization when it’s called for, and I think in bike accessories, it kind of is. It’s a minor gripe, really, but I say this in hopes that for future versions of the product, Darviso just adopts the same standard bits that everyone else uses. There are plenty of places to stand out from the crowd, the mount doesn’t have to be one.That having been said, the mount does work just fine, it just prohibits you from having multiple mounts from multiple devices on multiple bikes, and if you own 2 or 3 bikes like I do, well, that’s kind of something you hope to have.Beyond that, everything else about this is just golden. The light and “auto brake light” works fantastically and adds a huge amount of safety and visibility to me when I’m on the road. The radar also works well, but I did find it occasionally hits on things it probably shouldn’t. Not often, mind you, and so far, I’ve never had it miss an approaching vehicle from behind. But once in a great while, it’ll beep when passing a parked car or something. It’s kind of something that you learn to anticipate after you ride with it a while, to the point that you’ll pretty much know if you’re picking up the rare false alert vs the real ones.Battery life is pretty outstanding, and even on full blast you get 8 hours, with the other modes giving significantly longer life. Build quality is really good, it’s not machined from billet aluminum or anything, but the quality of plastics used seems decent to me, and with an IP67 waterproof rating, I’m not afraid to ride with it in the worst rainstorm. Not that I enjoy riding my bike in a rainstorm, lol.In terms of value, I think this is a pretty solid offering. It’s more expensive than some lesser models, yet cheaper than some of the bigger name brands, putting it pretty square in the middle in terms of cost. This “middle of the road” is where I tend to spend my money, as it rarely pays to buy something cheap, and buying the most expensive thing on the market is usually just a waste of money. Thus, I like the value here – a well-made, well-functioning product that I’m not afraid to spend a few dollars for if it works well, and it does.My hope is that the “X10” (or whatever their next model is called) will adopt an industry-standard mount, but for most folks this won’t make much difference here. At the end of the day, it’s a fantastic taillight / radar that I feel very good having on the back of my bike, as anything that helps me get home every time in one piece is money well spent in my book. 5 stars.
Hector & Rosangel –
Essential Cycling Safety Upgrade
This Ride X9 radar tail light offers truly essential safety for every cyclist. The 120 degree lane level vehicle detection system is incredibly accurate, providing reliable security alerts that give the rider plenty of advance notice of approaching traffic. This functionality integrates seamlessly with popular bike computers, displaying vehicle proximity information clearly and effectively.The smart rear light includes an impressive automatic brake feature that brightens the light instantly when slowing down, significantly increasing visibility to drivers behind. Its robust IP67 waterproof rating means performance is guaranteed in all weather conditions. Charging is easy and convenient with the USB C port. This device is a high quality investment for serious riders looking for peace of mind on the road.
Amazon Customer –
Did not connect to Wahoo Elemnt V3
Installation was very easy as it came with the hardware that makes it so. It was also quite lightweight which I appreciate. As a light it is bright and has a couple modes as far as how it flashes. Battery life seemed good and the thing is well-built. I could not get it to connect to my Wahoo Elemnt V3, though, and that was kind of the end of the road for me. I know I can install its app and use that, but I’m not looking to have a computer and my phone on my handlebars. So, I am no longer attempting to use this and can’t speak for how well it detects cars. That lack of functionality makes it useless to me. But if you know you’re using it with a compatible computer, I do believe it’s worth checking out.
Amazon_Customer –
A piece of mind – legit safety upgrade
I’ve been running the Ride‑X9 radar tail light for a bit now, and it’s quickly become one of those “why wasn’t I using this sooner?” upgrades. The lane‑level vehicle detection is the real deal—cars show up on the radar before I can hear them, and the alerts feel natural rather than jumpy. It’s the kind of quiet situational awareness that makes solo rides feel a lot less exposed.The light itself is bright, compact, and easy to mount, and the auto‑brake function is surprisingly responsive. Drivers seem to notice the sudden intensity bump when I slow down, which adds a layer of safety I didn’t realize I was missing. The USB‑C charging and IP67 waterproofing make it feel like a modern, no‑nonsense piece of kit rather than another finicky accessory.The Bluetooth alerts and app display give me a clean read on what’s happening behind me without pulling my attention away from the ride. It’s not trying to be a Garmin Varia clone—it’s just a solid, confidence‑boosting radar light that does exactly what it promises.What stood out to me- Radar picks up cars early enough to actually matter- Brake‑light response feels sharp and intuitive- Compact, unobtrusive design with strong visibility- USB‑C and waterproofing make it easy to live with- Mounting options are straightforward and secureBottom lineIt’s a legit safety upgrade—simple to use, accurate, and confidence‑boosting on every ride. If you want radar awareness without buying into a whole ecosystem, this one punches above its weight.
Jeff Schneider –
Functional but Pricey
I ride a bike for transportation (See the photos of my bike, set up for grocery-getting, with the radar unit mounted on the seatpost). I’m always looking for gadgets to improve my chances of survival when mixing it up with car traffic.In spite of the fact that the rear of my bike is cluttered with a rack and panniers, this radar unit functions decently. This is the first radar unit I’ve tried, so I can’t campare it with anything else. I can only describe what it does. It detects vehicles approaching from behind, as long as they are closing in on you. If they follow, matching your speed, they disappear from the screen. Also, vehicles shown to the left or right may actually be in your lane. If a vehicle moves from one side to the other, it shows this movement. Notably, I’ve seen no false indication from immoble objects adjacent to the roadway.The light is quite bright and has a number of useful modes, which can be selected using the app, or simply by scrolling through them with the power button.I had no trouble downloading and using the iOS Darviso app. Bluetooth pairing with my iPhone 14 worked perfectly. I was able to update firmware with no problem. In addition to showing approacing vehicles, the app shows your speed and distance ridden, and can save this ride data. Note that units are metric, without the option (as far as I can find) to change to imperial.This radar unit costs about twice as much as a similar light without the radar function. For my use, the radar is interesting, but not really better than a rearview mirror. I’m fully satisfied the the quality of this unit, the included accessories, the app, and the written instructions. But if you need to budget your money, it may be too expensive for the benefit you get.
Lou Costello –
I do not consider this item an extravagant luxury considering what its capabilities are.
I do not consider myself to be a cycling enthusiast, but I do like to ride my bicycle, and safety is of paramount importance to me. It is awesome that this wireless bicycle tail light detects an approaching vehicle and initiates a suitable warning light in response. It also initiates a slowing/stopping light whenever the bicycle is rapidly decelerating. Of course, a lot more options are available when used with the Darviso app. The app adds the ability to detect that a vehicle is approaching from behind, and what the general direction is from which that vehicle is closing. This real-time knowledge definitely increases my safety margin. I do not own a bike computer, but this Ride-X9 Bike Radar Tail Light also claims it is fully compatible with major bike computers.Setup was quick and easy. The light mounted to my seat-post easily using the included hardware. The Ride-X9 Bike Radar Tail Light paired with the Darviso app without difficulty. This item is pricey, but I do not consider this item an extravagant luxury considering what its capabilities are, and the added safety it provides.
Timothy –
Firmware updates and lowered price making this a good buy
Overall, it’s a pretty good product, but I have a hard time when this was released thinking that $200 was the right price for this when you can get the Garmin version of it for the same thing now they have come out with a couple of firmware updates since I’ve been trying it out that have definitely improved a few of the functions now I think it’s a much more clean polish product and if the coupon price right now you can get it for $139 instead of $200 so between the lowered price and the better interface that came along with the firmware updates, it’s becoming a much better bargain
JV –
Performs as well as Varia at a lower price
Overall the Darviso is a worthy competitor to Varia at a lower price. As someone who has ridden ~7000 miles with my Varia, this review will focus on how the newly-released Darviso compares in function. My riding is 50% rural gravel, and 50% paved roads including some small towns. Summary of pros & cons listed below.App: Downloading the Darviso companion app for my iPhone was easy, and it paired with the radar unit easily without issue. The app can be used to view vehicle detections but I did not use it. I typically use the bike computer integration with my other radar so I used the Darviso in the exact same way. Immediately after powering on the Darviso and pairing with the app, it prompted me to install a firmware update. The update applied in a couple minutes without issue. The app includes some ride-logging functionality – which I did not use.Pairing with a Wahoo bike computer: Pairing the Darviso with my Wahoo elemnt roam was easier than expected. Just turned on the Darviso, selected ‘add sensor’ on the Wahoo, and it was immediately available for use.Radar: The Darviso did a very nice job of detecting approaching vehicles, and even detected when there were multiple. Detection distance varied, but overall I think it was comparable to the Varia. There were no false positives (i.e. parked cars) or false negatives (i.e. missed cars) I noticed on my 30 mile road test. I was riding with another biker, and it would alarm when he was behind me catching up in speed – just like the Varia does. From an overall radar performance perspective, I could not tell the radars apart if doing a blind test. The one key advantage the Darviso has is its braking functionality. The light starts flashing quickly during rapid deceleration – something the Varia does not do. The light very bright, roughly equivalent in brightness to the Varia.Mount: The Darviso uses a quarter-turn mount that unfortunately has a smaller diameter than garmin-compatible mounts. The Darviso mount holds the unit securely, BUT lack of compatibility means one cannot use it with the many 3rd party garmin-compatible mount that can be found on amazon. Both the included mounts worked fine. Including a picture of how I used the seat-rail mount on a pannier rack I occasionally use for commuting. Another advantage of the Darviso is the included tether strap. I have one for my Varia, but had to purchase it separately at an added cost.Pros (vs Varia)- USB-c charging- Braking light- Tether strapCons (vs Varia)- Unique mounting hardware