1、High Charging Efficiency: Improve the charging current, compared with the traditional PWM controller, MPPT charging efficiency can be improved by 10 to 30%. (Controller conversion efficiency >95%) 2、Dual Battery Charging: Two groups of batteries can be connected at the same time, according to the priority set by the user to charge the battery, can maximize the use of solar energy. 3、With Bluetooth Function: External Bluetooth module can be connected, and controller parameters can be displayed through mobile APP (Bluetooth adapter needs to be purchased separately). Bluetooth effective distance is 10 meters. 4、Overcharge Protection: When the battery is full, the charging current will be reduced, and when the battery is out of power, it will immediately charge the battery. 5、Multiple Applications: 5 kinds of batteries can be selected by dip switch, GEL battery, AGM battery, lithium iron phosphate battery and lithium ternary battery. 1 x Solar Charge Controller1 x English Specification Item Type: Solar Charge ControllerMaterial: Aluminum alloyWeight: Approx. 903g/ 31.9ozBattery Connection Terminal: M8 screwsOperating Temperature: -20 to +50℃Constant Voltage Charging Time: 2hBattery Operating Voltage Range: 9V to 32VVoltage: 12V, Power: 360WVoltage: 24V, Power: 720W