1 x Solar panel 1 pair of alligator clips 1 x Car charger 1 x Manual 1 x Optional Solar Charge Controller 1 x 10 in 1 power cord Solar panels Maximum power (watt): 20W Working voltage (Vmp): 18V 0.3V Working current (Imp): 1.6A 0.15A Short circuit current (Isc): 1.8A 0.15A Open circuit voltage (Voc): 20V 0.8V Voltage temperature coefficient: (0.06510 0.15)% / C Current temperature coefficient:-(160 10) mA / C Temperature coefficient power:-(0.5 0.05)% / C Maximum system voltage: 20V Ambient temperature: -40 C ~ 85 C Air resistance: 50psi (2400pascals) Snow resistance: 113psi (5400pascals) Item size: about 420 x 280 x 5MM feature High efficiency the conversion rate reaches 35-37% Solar panel for flexible surface mounting Easy to install and easy to install Maximum solar input: Balance: 14.2V / 14.4V / 14.6V Floating point: 13.7V (default adjustable) Discharge stop: 10.7V (default) Discharge reconnect: 12.6V (default adjustable) Current consumption: