Feature:1. Built‑in overheating, overcurrent, short circuit, open circuit protection, troubleshooting, and automatic controller recovery.2. Auto‑focusing MPPT tracking charging, high charging efficiency, non‑stop detection during charging, two‑way focusing tracking.3. Large‑screen LCD display, adjustable charge and discharge parameters, with power‑off memory function.4. Two‑way MOS tube anti‑backflow circuit, high‑power charging mode, dual reverse current protection, low heat generation.5. Built‑in short circuit protection, open circuit protection, reverse connection protection, overload protection.Specification:Item Type: Solar Charge ControllerMaterial: ABSColor: As shown in the pictureProduct Size: Approx. 13.5x7x3.2cm / 5.3x2.8x1.3inWeight: Approx.153g/5.4ozRated Voltage: 12V 24V automatic (12V is suitable for 18V solar panels, 24V is suitable for 36V solar panels)Rated Current: 40ADisplay: LCD screenSelf-Consumption: <10MAOvercharge Protection: 14.4V/28.8VCharging Recovery Voltage: 12.6V/25.2VOver Discharge Protection: 10.7V/21.4VOver Discharge Recovery: 12.6V/25.2VDual USB Output: 5V/2A (charging mobile phone etc.)Working 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.Package List:1 x Solar Charge Controller1 x Chinese and English InstructionNotice:1. Please allow 1‑2in error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly diffe