Features: 1. When the battery is in the state of power failure or insufficient state, 12V solar car battery charger through solar energy to charge the battery of car motorcycle, snowmobile, tractor. 2. Made of durable ABS plastic and monocrystalline silicon solar cells, can be charged in daylight. 3. The solar panel is composed of built-in blocking diode, which can prevent reverse discharge, easy to install and completely free from maintenance. 4. Easy to use, simply plug the solar charger into the car's 12 voltage cigar lighter and position the panel to get as much daylight as possible. 5. Three installation methods: connect it directly to the battery using the included for crocodile clip, use two suction cups to attach the solar panel to the windshield, use a backplate to attach it to the sun shield. Specification: Condition: 100% Brand New Material: Silicon + Plastic Solar Panel: Monocrystalline Silicon 18V5W No-Load Voltage: 18-23VDC Load Voltage: 18V Output Current: 250-280mAh (0.2A-0.28A) Package List: 1 X Solar Panel 1 X Cable Clamp 1 X Car Charger Note: 1. It is recommended to unplug the charger at night because of the need for sunlight to illuminate the device. 2. The project is a battery maintainer, not a main charging device.