Features Smart Control: 5V 2.5A dual USB output enable quick and flexible charging of phone, tablet, computer and other devices, very useful. Reliable Work: Compatible with 12V 24V systems, can manage the solar panels and batteries with built in industrial micro controller. Practical Use: Suitable for solar power generation system, smart home, solar charger, solar ventilation system, solar light box, etc. Safer Working: Has good protection with over current, short circuit, reverse connection, low voltage, overcharge, safe and reliable. Easy Charging: Fast charging, large charging and floating charging 3 phase PWM charging control effectively prolong the battery life. Specification: Item Type: Solar Charge Controller System Voltage: 12V 24V automatic adaptation (11.1V 12.8V adjustable). Maximum Photovoltaic Voltage: 12V system < 25V or 24V system < 50V USB Output: 5V 2A, maximum. Standby Current: <10mA Working Environment Temperature: -35℃~+60℃ Package List: 1 x Solar Charge Controller 1 x English User Manual Little Note: This controller can only use photovoltaic panels as a charging power source. Do not use DC power or other power sources as charging power. Package List 1 x Solar Charge Controller 1 x English User Manual