XlitET smart bicycle taillight safety lamp for bike seatpost with motion sensor and auto brake

* Weight: 36G

* Waterproof: IPX5

* Lighting mode: 6

* Duration: 8 to 41 hours

* Dimensions: 78.5x20.5x27.5mm

* Material: CNC aluminum alloy body

* Battery: 500mAh rechargeable lithium-ion battery

** Brake detection

** Automatic brightness

** Automatic start/stop

** Improved visibility

** USB Type-C charging

** Lightweight design