Dear，Pls leave a massage to tell us what design (Color) do you want.thank you.

Features：Plastic 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：8.4 VOver-discharge protection voltage: 5 VOver-discharge protection current: 9 AStandby current: 10 uAUSB output standard voltage: 5 V±0.2USB max output: 2000MAMaterial：PlasticColor: BlackWeight：125gPackage Weight: 144gSize: 45x47x88mmCable Length: 57cmStrap: 41.5x3.8cmPackage Contents：1 x Battery Case (Batteries not included)1 x Strap