ENFITNIX Cubelite III Smart Bike Tail Light,Brake Sensing Rear Lights,Waterproof,USB-C Rechargeable,Ultra Bright LED Warning Back Lights

Small, compact, brilliant taillight with auto-ON, auto-OFF, and auto brake light features. Mount anywhere with quick release to preclude theft. Best of 3 previous tail lights I've owned. Well-designed and engineered. Terrific product!

When you first pick up the light, you can tell it’s of sturdy well made construction, and slightly heavier than other similar brake lights. The only control button is on the top (or bottom depending on how you install it onto the included mounts) that functions as an ON/OFF, 4 light configurations & switching between manual and smart mode.The brake sensor function is very accurate on detecting any change in speed and the brightness emitted from the LEDs creates a glow detectable from a large distance. The 4 light configurations can be changed with just a tap of the control button. While in smart mode, the light turns on when it detects motion and shuts itself off after a period of stillness - no more having to worry about killing the battery by leaving it ON.All the hardware are included to mount the light either on the seat post, or directly under the seat, and the light unit is removeable from the mount by twisting it counter clockwise.There are two down side to the light but not enough to deter from purchasing it…- The charging port cover on the back of the light is somewhat difficult to open to access the usb-c port; the pull tab is very small and my fingers had a hard time grabbing the tab.- Mode indicator (weather or not in Smart mode) is not viewable when attached to the mount.In the end, this is a very good brake light that will give you many years of reliable use.

This light works great. When you slow down the bright light activates. Its small form factor is perfect for under seat on post or on back of cargo rack (That is where i mounted mine). Easy to remove and recharge using usb.

The light itself is nice. Bright and easy to see… but the battery life leaves much to be desired. Lasts maybe 3-4 hours and then dies. Not ideal.

The light is pretty good. It is bright, it has brake sensing and has various modes that can be used under any condition.Here is more of my take on this light for those who may be interested. I think that the braking feature, although it is nice, is not really effective because it is not a known convention where motorists are expecting the brake light as they are on other cars. There is nothing bad about having it, but you shouldn't think it will be safer. A second point to keep in mind is that your safety will improve if you have more than one rear light. I have some really good ones, which are my primary rear light, and then I have a secondary one. This light serves as the secondary. For rides longer than 4 hours, you should also carry a spare charged light. This light is great for that.