How to Use: Ready to use under the sun Specification: Item Type: Solar Panel Parts Material: Monocrystalline Silicon Gross Weight: Approx. 1017g/35.9oz Solar Panel Size: Approx. 42x42cm / 16.5x16.5in Controller Size: Approx. 13.3x6.8x3.5cm / 5.2x2.7x1.4in Controller Rated Current: 50A Controller Rated Voltage: 12V (420W) 24V (840W) Automatic (12V is Suitable for 18V Solar Panels, 24V is Suitable for 36V Solar Panels) Maximum Power (maximum): 30W Open Circuit Voltage (voc): 20V Maximum Power Voltage (vmpp): 18V Short Circuit Current (isc): 1.6A Maximum Power Current (impp): 1.25A Output: USB 5V Feature: Without Power Storage Function Standard Test Conditions Am=1.5 Irradiance=1000w/㎡ Temperature= 25℃ Package List: 1 x Solar Panel 1 x Car Charger 1 x Battery Clip 4 x Suction Cup 2 x Carabiner 1 x Solar Controller 2 x Chinese and English Manual