1.FUNCTION: The solar controller has a large LCD display, which allows you to clearly observe the charging and discharging current, cumulative power generation and discharging, the controller also has light control delay control; adjustable charging and discharging parameters with power failure memory and other functions. 2.MULTI-PROTECTION: Solar regulator 12v supports dual USB outputs with a maximum current of 5V 2.1A. The regulator is also equipped with 6 kinds of protection, built-in short-circuit protection, open-circuit protection, reverse connection protection and so on. It has adjustable system control parameters and easy setup operation. 3.INDICATION: PWM Solar Charge Controller can visualize various states, when the solar panel is charging, the arrows between the panel icon and the battery icon will flash fast, when the battery is fully charged, the arrows will flash slowly and stop charging. 4.SPECIFICATION: 122*100*33mm; Rated voltage: 12V/24V; Rated current: 30A; Maximum voltage: up to 23V for 12V battery, up to 46V for 24V battery; Maximum voltage input power: 390W. 5.EASY TO USE: Solar PV Regulators adopts 5.5*2.1mm DC interface, which can be directly connected to portable folding solar panels, the charge controller should be connected to the battery first, then to the solar panels, and finally to the loads, the DC interface can directly output 12V loads, which is more convenient to install..Items from YU wen's store