Features 1、MAIN FUNCTION: This MPPT solar charger allows you to transfer the power from solar panels or other photovoltaic devices to rechargeable batteries. 2、EASY TO USE: Insert the solar panel into one side of the solar charger, and then insert the battery into the other side to start charging. 3、STABLE CHARGING: With the maximum power point tracking function of solar panels, the solar charger board provides complete charging management for a single lithium battery. 4、MULTI FUNCTIONS: The constant current charging current is set by an external resistor; Trickle charging of deep discharge batteries; Automatic charging function. 5、CHARGING DETAILS: Charging current up to 2A; PWM switching frequency 300KHz; Constant voltage charging voltage 4.2V ± 1%. Specification Item Type: Solar Charger Board Material: PCB Features: Interface: 2Pin PH2.0 JST Maximum power point tracking function of solar panels Complete charging management for a single lithium battery Charging current up to 2A PWM Switching Frequency: 300KHz The constant current charging current is set by an external resistor Trickle charging of deeply discharged batteries Automatic recharge function Indication of charging status and charging end status Package List 1 x Solar Panel Module 2 x Connect Cable