Feature Used to charge mobile phone MP3 pad or other USB charged device Double USB female port easily charge device via USB charging cable You can place the panel in the sun and use it to directly charge your device Great for outdoor cycling climbing hiking camping traveling etc Specifications Solar Panel ISC 3 33Voc 20VVpmax 18VPower 50W Ipmax 2 77AOutput 5V 18VSize 662x280x2 5mmWaterproof rate IP65Conversion rate 19 6 20 USB port quantity DoubleMaterial Monocrystalline silicon cellSuitable for Cycling Climbing Hiking Camping Traveling etc With Timer and light sensor it could work for solar light system Only For off Grid PV Solar System For 10A 12V Pv System 120W Solar Panel 12V Lead acid Battery 21V for Max input Voltage For 10A 24V Pv System 240W Solar Panel 24V Lead acid Battery 42V for Max input Voltage Package includes 1X 50W Solar Panel1X Crocodile Clip1X Car Charger