This product is a solar cell panel kit, made of monocrystalline silicon, ABS, rubber and copper material for durable to use, which can absorb sunlight and transfer the solar energy into electricity power. Suitable for outdoor activities, such as camping, cycling, self-driving trip, etc. Features -Color: Black. -Material: Monocrystalline Silicon, ABS, Rubber, Copper. -Size: About 42.00X28.00X2.50cm/16.51X11.00X0.98in. - The controller has intuitive display that can clearly indicate the status and data is able to modes and parameter configuration. - Strong resistance, can withstand different environments, good waterproof performance. - First, connect the battery, then connect the solar panels, when you first use it, make sure the battery has enough voltage. - Suitable for car, RVs, ships, airplanes, outdoor breeding, planting, tourism. - Flexible configuration of solar module parameters for more flexible configuration of controllers and batteries. Specification: Maximum power (pmax): 15W. Open circuit voltage : 20V. Maximum power voltage (vmpp): 18V. Short circuit current ( ): 1A Maximum power current (impp): 0.75A. Output: 18V. Test condition: AM=1.5. Irradiance=1000W/square meters. temperature = 25 degree centigrade. Package list: 1 panel 1 controller 1 charger 1 x battery clip 4 x suction cups 2 x carabiners 1 x manual