(1) Bluetooth series solar controller, support for mobile app wireless Bluetooth connection, support battery type and load mode parameter configuration and real-time monitoring of device status. (2) Protection function: charging over voltage, over current protection; load short circuit, over current protection; battery low voltage, over voltage protection; equipment internal overheating protection . (3) The battery supports 12/24V self applicability and supports USB phone charging. Colour:Blue Material:plastic type:20A/10A Package Contents: 1 x PWM Solar Charge Controller Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.