1、Auto focusing PWM tracking charging, high charging efficiency, non‑stop detection during charging, two‑way focusing tracking. 2、Built-in overheating, overcurrent, short circuit, open circuit protection, troubleshooting, and automatic controller recovery. 3、Two‑way MOS tube anti‑backflow circuit, high‑power charging mode, ultra‑low heat. 4、Charge 12V/24V lithium battery, ultra‑wide charge and discharge adjustable. When the output is off, the minute is adjustable, which is more convenient. 5、Built‑in short circuit protection, open circuit protection, reverse connection protection, overload protection. 1 x Solar Charge Controller1 x Chinese and English Instruction Item Type: Solar Charge ControllerMaterial: ABSColor: As shown in the pictureProduct Size: Approx. 13.5x7x 3.2cm / 5.3x 2.8x 1.3inWeight: Approx.152g/ 5.4ozRated Voltage: 12V 24V automatic (12V is suitable for 18V solar panels, 24V is suitable for 36V solar panels)Rated Current: 20ADisplay: LCD screenSelf-Consumption: <10MAWorking Temperature: -35℃-60℃The regulator is suitable for batteries: OPEN, AGM, GELHow to UseConnect the positive and negative poles of the battery to the controller, and the controller will automatically detect the battery voltage and connect the solar panel to the controller.