Specifications:Lighting and accessories category: LEDThe maximum brightness: 300 luminousThe maximum range: 50m-100mMaterial: aluminum alloyWeight: 180 gPackage Size: 14.5cm * 13cm * 5cmBattery type: built-in batteryContinuous lighting time: 3 hoursUse of time: 100000 hourswaterproof: YesRechargeable: YesZoomable: NoThe use of the environment: camping\ride\outdoor sports\climb etc.Package Included:1 x LED Wrist light (Include Wristband)1 x Compass1 x Micro USB cable