Switch: Press the switch to adjust the three modes: strong light/low light/flicker.Usage: Night running, cycling, fishing, camping, skiing, adventure, emergency, etc.Specification:Material: ABSColour: BlackLight gear: strong light-weak light-flashingWarning tail light: strong light-weak light-flashingFunction: lighting, night riding, work lightsCharging way: MicroUSBPower supply: polymer battery 1200mAhEndurance: 3-4 hoursVoltage: 3.7V-4.2VPower display: 25%-50%-75%-100%Lamp beads: COB lamp beads*40Shooting distance: 0-50mWaterproof: IPX45Brightness: 350 lumens (theory)Product net weight: about 107gSize: 129*38mmSingle color box: 130*70*60mmPacking list:Head light*1USB cable*1Buckle*4