20W 12V Solar Car Battery Charger is the perfect trickle charger/maintainer for 12V batteries of cars, motorcycles, boats, snowmobiles, tractors etcPlease note that the protective plastic film on the panel surface is supposed to peel off. The cigarette plug option only works if it has constant power when the key is out of the ignition. When you start the car, please remove the solar panel from the car batteryCharging 12V rechargeable batteries in emergency, suitable for vehicles in outdoor work or travel or camping training. Easy to install and completely maintenance-freeUnique design-high quality clips to prevent short circuitEnvironmental protection and energy saving, built-in blocking diode to prevent reverse discharge, not only maintains the battery lifetime but also extends its usage lifeMax power: 3ASize: 240 x 352 x 2.5 mmWaterproof: IP65Conversion rate: 19.6-20%Number of USB ports: singlecolour:BlackMaterial:Monocrystalline siliconPackage Contents:1 x 20W Solar Trickle Charger1 x Alligator Clip Adapter1 x Cigarette Lighter Adapter4 x PVC SuckersOnly 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.