1. Solar panel is used to charge mobile phones, MP3, pad or other devices with USB charging.2. Dual USB female port, easily charge the device via the USB charging cable.3. You can place the panel in the sun and use it to directly charge your device.4. Perfect Compatible With outdoor cycling, climbing, hiking, camping, travel, etc.5. Integrated industrial microcontroller. Complete 4-stage PWM load management. One-key configuration, digital display, automatic memory function. Dual mosfet reverse current protections, low temperature productions. Built-in short circuit protections, open circuit protections, reverse protections, overload protections.Solar panel Specification:USB output: 5VUSB ports quantity: DoubleSolar panel voltage: DC12-18VSolar panel power: 10WController Specs:Model: PWMBuck charge: 28.8VFloating charge: 27.4VUSB output: 5V / 3A 5V / 2ASelf-consumption: less than 10mADischarge stop: 21.4VVoltage: DC 12V / 24VMaximum solar input: less than 50VRated operating current: less than equal 20ADischarge reconnection: 25.2VWorking temperature: -35 Celsius - 60 CelsiusOutput voltage: 12V / 24V automatically distinguish voltagecolour:BlackMaterial:plasticPackage Contents:1 x Solar Panel1 x DC18V Output Clip1 x Car Charger4 x Suction Cup Adsorption1 x Solar Controller(40A)Only the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.