Features:Solar Panel:Used to charge mobile phone, MP3, pad, or other USB-charged device.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(18V/5V) Ipmax: 2.77AOutput: 5V/18VSize: 660*280*2.5mmWaterproof rate: IP65Conversion rate: 19.6-20%Material: Monocrystalline silicon cellSuitable for: RV Car Cycling, Climbing, Hiking, Camping, Traveling, etc.  Safety Instructions:1.Make sure your battery has enough voltage for the controller to recognize the battery type before first installation.2.The battery cable should be as short as possible to minimize loss.3.The regulator is only suitable for lead acid batteries: OPEN, AGM, GEL(It is not suited for nickel metal hydride, lithium ions or other batteries).4.The charge regulator is only suitable for regulating solar modules. Never connect another charging source to the charge regulator.　 　System Connection:1.Connect the battery to the charge regulator - plus and minus.it will show 1 ,if it detects 12V battery, 2 if it detects 24V battery.2.Connect the photovoltaic module to the regulator - plus and minus.3. Connect the consumer to the charge regulator - plus and minus.  Package includes:1X Solar Panel1X 30cm DC Male Cable1X Crocodile Clip1X Car Charger1X User Manual