This Wicked Cool Smart Tail light Acts as Both a Running Light and A Brake Light.
Auto sensing motion technology identifies when the brakes are applied and alerts any riders or cars behind you that you're slowing down.
Mount to seat, seatpost, rear rack or seatstay.
IPX4 waterproof design
Auto on and off function senses motion
Rechargeable via USB Cable/Port
Double Your Safety Factor. Put One on Each Side!
Material: aluminium alloy + ABS
Battery: 3.7V, 350mAh
Charge time: 2 hours and 20 minutes
Charging current: 5V, 280mA
Modes: manual / automatic
Item size: 1.2 * 1.1 * 1.2in
Item weight: 1.0ounce
Smart Tail Light