Pedallon USB Rechargable LED 100 Lumens Rear Bike Light Super Bright Light with 6 modes; Standard, High, Overdrive, 50% Flashing, 100% Flashing, Strobe Quick release rubber strap for seat post included. Low Battery Charging and fully charged indicator plus automatic fully charged cut off system Side Visibility, Water resistant, includes USB cable, Easy to use. Recommended by two Independent London Bike shops. Up to 6hrs 50 mins run time on standard, 3hrs on High, 1hr 45 mins on Overdrive, 5hrs 50mins on 50% flashing, 3hrs on 100% Flashing and up to 4hrs on Strobe with a 2 hr charge time.