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

This is a great light. The construction is very solid, it's nice and bright, has several different flash modes, and turns off when it's not needed so the battery lasts a decent amount of time for its size. I'm using the under seat mount on a road bike and you barely notice that it's there, which means it doesn't get stolen. My only (minor) gripe is that the motion sensor is a little too sensitive. I chain my bike to a tree sometimes, and a light breeze is enough to turn it on sometimes.

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.

I'm somewhere between dumb and liking to take risks so I rode for awhile without a front or rear. In an attempt to cherish my life I finally replaced my stolen one. This light is fantastic. The behavior is super easy to figure out, the c-type makes it hella convenient to charge, same aluminum design as the larger one but just cuter. Smaller battery but who cares? It auto shuts off no problem and if you're like me and remove it during the day a long press will keep it from accidently turning on. Can't be beat. Plus I adjusted the mounting today and it fits just snug as a bug. They should make this exact light for the front. SAME EXACT THING. Just in white, yeah this is awesome and I don't regret buying it. Comes with a second mount too that just wraps around, glad its included but it makes it easy to steal. Would def buy again though (assuming this one doesn't vanish!) Woohoo life! I didn't say anything about brightness AI, stay outta of it lol. It's pretty bright, it's behind me though so lolol

UPDATE: Rockbros refunded my purchase price, and I will re-buy when they make a unit that has auto on/off and motion sensing in the daylight. Outside of that, it is a very nice unit. Small and bright, with a good mounting system. The brake light algorithm seems to work well. UPDATE: The Q5 is a Tail light. The one I have, does not have auto on/off, motion sensing in the daylight - despite what RockBros.says. In fact, if you very carefully read the PR info, it says this. The tail light has manual mode, strobe flash and contiguous in the daylight, not auto on/off motion sensing. The RockBros Q5 tail light Has several problems. There is no way to shut off the ambient light sensor for the blink and breath functions. This makes it useless in the daylight and only useful at night. So the kid riding to and from school does not have a tail light, which is why I bought a vibration sensing/auto shutoff light in the first place. The manual says that mode 3 and 4 (strobe blink and continuous) are useful in the daylight, but they do not have vibration sensing or auto shutoff. So to get into that mode you have to push the button through all the other modes, and same to shut it off - not very "smart". So, I took the unit apart (thus voiding the warranty) to see if I could cover up the ambient light sensor. That didn't work because they use the off cycle of all the LEDs to sense ambient light. So, I had to block all the LEDs to keep it blinking in the daylight. I asked this question before I bought it, and got an inexact answer back from someone who is not a native English speaker.

Excellent tail light! Super bright, automatically senses braking, and adds great visibility at night. Easy to mount, long battery life, and very reliable for safe rides.

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.

It just works. The accelerometer braking feature is really nice and the motion sensing to save battery is perfect. Thread in mount protects the USB port, perfectly. What a great design. Long life. Bright. Useful modes.

Excellent tail light that is well made and water proof as the charge connection is protected by the outer shell that the unit screws into. Long lasting and with different modes of light you will be seen..