The XLC product range is now 2000 lines strong. Allowing us to satisfy top athletes as well as your everyday cycling needs.Features:Bright tail light,A red 0.5 watt LED on the bottom, 5 red LEDs on the side,Functions: on-off,Battery: Lithium polymer battery 3.7V / 700mAh with PCM (Power Circuit Module), offers overcharge detection (OVP) & overdischarge detection (UVP),Includes micro USB cable,Waterproof: IPX4,Low battery indicator,Charging time: 2-3 hours (The indicator lights up green while charging and is off when charging is complete).