Specification Rated voltage: 12V Battery capacity: 7-9ah Maximum charging current: 2A Maximum discharge current: 3A Maximum PV open circuit voltage: 30V Undervoltage protection: 10.8-11.1V Boost charging voltage: 14.4V Floating charge voltage: 13.8V USB output: 5.2v/2.1a Features 100% brand new and high quality New socket installation, fast and convenient connection. Liquid crystal display, real-time observation of generator voltage status. 3 stage charging, fast charging, lifting charging and floating charging. Dual 5.2a/2.1a dual USB output. Over discharge, over charge and over-voltage protection. Battery reverse connection protection. Charging and discharging overload and short circuit protection. Charging automatic startup function. Please understand because of the light irradiation or computer display difference, so I can't guarantee photos and real color is 100% Package Included 1* Solar Controller