1. Connect the positive and negative poles of the battery , the controller will detect the battery voltage automatically ;2. Connect the solar panel to the controller;3. Connect the load as show , don't connect it reversely;Note: Please connect in strict accordance with the picture show,otherwise it may cause the controller short circuit; the disassembly sequence is opposite to the connection sequence. Features:* Used to charge MP3 phones, pads or other controlled devices.* Dual female USB ports, you can easily charge the device through the * USB charging cable.* You can put the panel in the sun and use it to directly charge the device.* Suitable for outdoor biking, mountaineering, hiking, camping, traveling, etc. Specification:Material: Monocrystalline Silicone BatteryPower: 100WWorking current: 5AVoltage: 18VWaterproof rate: IP65Rate conversion rate: 17.8%Number of USB ports: doubleSize: 36 * 33cm / 14.2 * 13inchColor: as show Packing Included:1 X Solar Panel4 X Suction Cup2 X Buckle1 X Alligator Clip1 X Car Charger1 X DC Male Cable Note:1. Please allow 1-3cm (0.4-1.18") difference due to manual measurement and slight color variation for different display setting.2. Due to the light and screen difference, the item's color may be slightly different from the pictures. Please understand.