Automatic accelerometer brake light function shines 100 lumens bright
2 Modes (runtime): Solid - 20 lumens (12 hours), Flash - 80 lumens (30 hours)
USB rechargeable li-polymer battery
Weatherproof exterior for all season riding
Includes brackets for seatpost and seatstay mounting
Mounts vertically or horizontally
Includes Micro USB recharging cord
Weight: 1.9 oz