Features£ºPlastic material、 lightweight and durable Waterproof functionEasy to use、 suitable for 2 or 4 x 18650 batteriesWith DC interface、 Output and input voltage are 8.4V USB interface、 can charge mobile phoneOver-charge protection voltage£º8.4 VOver-discharge protection voltage: 5 VOver-discharge protection current: 9 AStandby current: 10 uAUSB output standard voltage: 5 V¡À0.2USB max output: 2000MAMaterial£ºPlasticColor: BlackWeight£º125gPackage Weight: 144gSize: 45x47x88mmCable Length: 57cmStrap: 41.5x3.8cmPackage Contents£º1 x Battery Case (Batteries not included)1 x Strap