450 lumen headlight, 50 lumen tail light Day and Night use featuring 7 modes (HL), 6 modes (TL) Both feature SteadyPulse mode to alert motorists Both feature DayLightning to standout in broad daylight Adjust the TL brightness of Steady mode and flash tempo w/2 buttons USB rechargeable internal battery lasts up to 100 hours (HL), 200 hours (TL) Low battery indicator alert when a charge is needed Light mode memory saves the current mode before the light is turned off Low profile, water resistant design weighs 116 grams (HL), 55 grams (TL) Quick release handlebar and seat post mounts