1Full 3?level smart PWM charging management, high efficiency. Dual MOS anti?backflow circuit, low heat generation. 2Large LCD screen with backlight, clearly displays system operating information, indicates status and data, easily switch modes and parameter configurations. 3Charge and discharge parameters can be adjusted, with power?off memory function. Automatically recognize the 12V/24V system voltage. 4Built?in short circuit protection, open circuit protection, reverse connection protection and over current protection, safer for using, ideal for home, industry, commercial, etc. 5The terminals are marked with corresponding icons for connecting the battery, solar panel and DC load. Please install it in a well-ventilated place. 1 x Solar Charge Controller 1 x Wire Connector 1 x Manual Item Type: Solar Charge Controller_x000D_Material: Plastic_x000D_Output Voltage: 12(V)_x000D_Usage: Solar power generation_x000D_Woke Voltage: 12/24V_x000D_Charging Type: PWM_x000D_Maximum Input Power: 520W(12V system); 1040W(24V system)_x000D_Size: Approx. 130 x 190 x 62mm/5.1 x 7.5 x 2.4in 1Full 3?level smart PWM charging management, high efficiency. Dual MOS anti?backflow circuit, low heat generation. 2Large LCD screen with backlight, clearly displays system operating information, indicates status and data, easily switch modes and parameter configurations. 3Charge and discharge parameters can be adjusted, with power?off memory function. Automatically recognize the 12V/24V system voltage. 4Built?in short circuit protection, open circuit protection, reverse connection protection and over current protection, safer for using, ideal for home, industry, commercial, etc. 5The terminals are marked with corresponding icons for connecting the battery, solar panel and DC load. Please install it in a well-ventilated place. 1 x Solar Charge Controller 1 x Wire Connector 1 x Manual