ROCKBROS Bike Tail Light Smart,Brake Sensing Bicycle Rear Lights,Ultra Bright LED Back Lights,Type C USB Rechargeable,IPX6 Waterproof,Cycling Safety Taillight Accessories

I purchased this taillight to augment the anemic flasher on my Garmin Varia Radar. The RockBros light is a great value and an excellent rear light. A full charge seems to last forever and the brake light function is appreciated by riding partners. The light is very bright and easily visible even on a sunny day. The light came with two mounts, a strap for the seat post or a clamp on mount for the seat rails. The light screws into either of them just like a bottle cap. The charging port is accessed when you unscrew the light from the mount. The strap mount works fine, but as a rule I just don't trust straps. I used the clamp mount, which installed easily and holds the light in place on the rails. The clamp was a slight bit loose on my rails, but a small bit of tape under the clamp fixed the issue. I've used the light for about 1500 miles on gravel and trails with no issues. Taillights are a simple bit of kit, but I really appreciate the added visibility, both day and night. Hard to beat the value and function with this light.

works unbelievably well. super easy install considering it gives you multiple ways to mount. My sister normally follows right behind and the brake sensing works perfect she knows when im slowing down and its bright enough for cars to see me at night. definitely worth the money

Good build quality and mounting hardware feels secure. I like the two mounts included; one light for two bikes; just unscrews from one mount to screw onto the other. USB-C charging is always nice. The 4 modes have good options for always flashing or motion detection. Brightness is pretty good for night-time, but won't overcome sunset-type conditions and the light is not very noticeable in daylight. I'd recommend finding a brighter rear light for day time. The 4 dots for battery level are helpful but don't work great. I haven't seen 1 dot "25% battery life" because it dies after it gets to 2 dots. That said, if it's charged up the battery life is still decent and overall still a good light.

This is a fantastic light, very simple to put on, able to adjust it to my bike, works well, and last for a while before it needs to be recharged.

This is the best taillight I’ve come across. It’s made of metal-not plastic. It screws securely to the rods under the bike seat or it will “bungee” to the seat tube. The light itself unscrews to recharge and seems to hold a charge for a good amount of time. It offers a variety of blink settings. I particularly like the charge level indicator- four tiny blue lights around the center of the lens that go out one at a time as the level decreases. It is very bright and easily seen in daylight. I would buy this light again.