... : 3.7v, 4.2v, 5.5v, 9v - Output Current: 400-800mAh Solar Panel: Monocrystalline silicon panel LED Indicators- Battery status (25 ... %, 50%, 75%, 100%) - USB connection - Solar charging Input / Output / Buttons- Voltage switch: 3.7v, 4.2v, 5.5v ... Technology Co., Ltd. Is a professional manufacture of solar source and solar products with several years of experience, which have strong ...