Built-in battery specifications: 800mAh / 3.7V lithium battery – External interface: Micro V8 USB/5+0.2V – External supply current: 400±50mA – Power your phone and other devices with a USB cable – High lumens: high power 1W white light 90-140lm – Mode: Low light mode, strong light mode, SOS flashing mode – 5V Solar adapter charger – Intelligent chip protection: overcharge protection, over discharge protection, short circuit protection – Product size: 84*50mm Telescopic size: 84*125mm.