Feature:1. Smart Charge Maintenance: Solar panels have a built in smart MPPT charge controller that produces at least 1020% more power than conventional controllers.2. Solar Battery Charger: Solar panels convert sunlight into electricity, which is energy saving, environmentally friendly and pollution free.3. High Conversion Rate: Made of monocrystalline silicon and ETFE material, these solar panels offer higher conversion efficiency and lower losses compared to polycrystalline silicon.4. Comprehensive Protection: The solar panel can prevent battery overcharge, overvoltage, discharge, short circuit, with reverse polarity protection and waterproof.5. Automatic Charging: The solar panel can automatically charge during the day and automatically shut down at night without consuming battery power, increasing charging efficiency by 20%30%.Specification:Item Type: Solar Battery ChargerMaterial: Monocrystalline silicon, ETFEPower: 30WOutput Voltage:DC Port: DC 12VUSB Port: DC 5V TYPE C Port: DC 5VSolar Panel Size (L x W): Approx. 420 x 270mm / 16.5 x 10.6inWaterproof Rating: IP67.Package List:1 x Solar Battery Charger1 x Battery Connecting Cable1 x Car Charger Cable4 x Sucker1 x InstructionNote:Manual measurement, the size may have errors