XIAOKOA Smart Bike Tail Light, Bicycle Lights with USB Rechargeable Bike Brake Lights, Colorful Cycling Taillights with Waterproof Rear Bike Lights for Mountain Cycling Taillights, and Road Bike

Works really well not sure about battery life but I love how it senses you are braking and gives the brake signal.

Good Quality

The light itself functions well and is robustly made, only just received, so as yet cannot comment on battery life/charging, but is bright and the 4 modes gives lots of choice. The seat rail mount only just fits a narrow racing bike seat rail, just don't forget to attach the plastic red spacers. The seat post rubber mount would (I guess) be fine for a normal round seat post, but unfortunately does not fit an aero seat post.

Happy

One of the best bike light a have. Clean installation.

Extremely well made for the price.

Very nice looking and smart sensor

Ok