Features： - It can be used as an alternative charger for cars trucks caravans boats motorcycles RV batteries or any 12V lead acid battery. - It is waterproof and can be placed outdoors. - There are built-in diodes in the alligator clip to help prevent reverse charging. - You can install this item in your car and keep charging during the day. - Provides 2 alligator clips and charging cable for all kinds of equipment emergency lights advertisinglights traffic lights electric fans solar water pumps motorcycles boats etc. specification： Product Features: Colour: Black Material: Panel: Monocrystalline silicon Size: 21.5*18.5cm Power: 20W USB output: 5V 2A (maximum) Solar output: 12V Solar panel type: solar Conversion efficiency: 23-24% Product interface: USB DC Output interface: DC / dual U No-load voltage: 14V DC and USB 5.2V Load voltage: 12V DC and USB 5.0V Output current: 600 mA (max) USB 2.0 output: 5V 600mA Applicable to: mobile phones mobile power packs laptops tablets GPS cameras USB fans USB lights etc. Instructions： 1. First the solar panel surface of the solar panel faces the sun and the back USB output surface has a red light indicating that the current output is normal. 2. Plug the USB 2.0 cable into the USB output port and the USB output standard 5.0V DC voltage. 3. Connect the mated DC alligator clip and the alligator clip outputs a DC voltage of 12v (14V at no load). Note: The positive and negative crocodile clips cannot be connected or touched during use which may cause short-term heat or burn the line. 4. With the mountaineering bag this product is suitable for low-power products with 5V power supply or low-power products with 12V power supply. Package includes: 1x Solar panel 1x Alligator clip 1x Cigarette lighter Tips 1. Please do not scratch the surface of the solar panel with a sharp object. 2. When charging the charger with solar energy please place the solar panel upwards in direct sunlight to ensure the charging effect. 3. Please do not put the charger outdoors on rainy days to avoid short circuit. The front of the solar panel is waterproof but it is best not to enter the water at the USB and DC interfaces.