Working Mode: Power on/off > Long press the button and press the switch for 0.5 second to change working modes. Working Time: High brightness flash: 5LM about 8 hours. Low brightness steady: 2LM about 4 hours. Low brightness flash: 2LM about 24 hours. Battery: Built-in Lithium 200 mAh. Charge: Micro USB 5V / 0.1A. Lighting: LED. The brightest: 5 LM. Illuminate range: More than 1000 m. Visual angle: More than 220 degrees. Waterproof level: IPX5. Size / Weight: 32 mm x 23 mm / 29 gram.