Feature: This product adopts a new conversion method to double the working current of solar output with the same area and power. Multiple protection, portable, reliable charger:With overcharge&reversal drain protection modules, convenient to use the solar trickle charger with various vehicle, RV, Camper, Tractor, Motoecycles,Snowmobiles,Boat, etc. Specifications: Material:PET+Poly silicon cell Waterproof rating: IP65 Solar energy conversion rate: 20% Vpmax:12v NOCT(nominal operating cell temperature):40-85°C Size:30x16cm USB Output voltage: output: 12V Self-consume:<10mA Operationg temperature:-35-60℃ .