Item Type: Solar Charge Controller Material: ABS Current: 10A Voltage: 12V 24V automatic recognition. Solar Input Voltage: Less than 55V. USB Output: 5V 1A Operating Temperature: -25 to 55 Protection Class: IP30 1Safer Charging: Using 3 level PWM charging algorithm to ensure balanced battery charging and discharging, which can prolong battery service life. 2Auto Operation: Enables auto recognition on 12V and 24V systems as well as auto adjustment on charging parameter, also has temperature compensation. 3Working Safety: Able to provide overcharge protection, over discharge protection, overload protection, short circuit protection, etc. for safety. 4Better Display: The graphic LCD screen enables a better viewing for easier working, while the clear operation panel will bring you more convenience. 5Easy to Install: Comes with a light weight and a compact size, the simple installation can be quickly completed within several minutes.1. When connecting to a 24V system, the terminal voltage of the battery board may exceed the safe voltage of the human body. If operation is required, insulated tools should be used and hands must be dry. 2. If the battery is reversely connected, the controller will not be damaged, but there may be negative voltage output at the load end, which may damage your load equipment. Take care to avoid this. 3. In a 24V system, if one end of the battery or solar panel is reversely connected, the controller is likely to be damaged. 4. A large amount of electrical energy is stored in the battery. Therefore, battery short circuit cannot occur under any circumstances. We recommend connecting the fuses on the battery in series. 5. The battery may produce flammable gas, so keep away from sparks. 6. Please ensure that children are kept away from batteries and controllers. 7. Follow the safety advice given by the battery manufacturer. 1 x Solar Charge Controller 1 x User Manual