Feature: 1. Dual USB Port: USB output, 5V 3A maximum, dual USB supply power to two mobile phones, tablet PCs, and other devices, improve your charging efficiency. 2. Solar Battery: Solar charge controller just works with OPEN, AGM, GEL batteries, not for NiMH, lithium, or other batteries. Help to prolong the battery life cycle and keep the load work well. 3. Multiple Conservation: Build in short circuit conservation, open circuit conservation, overcurrent conservation, overload conservation, safety for using. Suitable for home, industrial, commercial, workshop etc. Suitable for small solar energy system. 4. Easy to Install And Operate: Clearly indicate the status and data, can be conveniently switched modes and parameter configuration. Large LCD display, easy to read the data. 5. 12V 24V Voltage: This is new solar controller, it can fully meet your home photovoltaic system (including home lighting system ) requirements. It can recognition 12V and 24V battery, lithium battery, gel battery automatically. Specification: Item Type: Solar Controller Material: ABS, Aluminum Alloy Current: 50A Color: White and Green Rated Charging Current: 10A, 20A, 30A, 40A, 50A, 60A Rated Discharge Current: 10A, 20A, 30A, 40A, 50A, 60A Voltage: 12V, 24V automatic identification USB Output: 5V 3A Standby Current: Less Than 10mA Working Temperature: -35℃ to +60℃ Item Size: Approx. 193 x 98mm / 7.59 x 3.86in Item Weight: Approx. 390g / 13.76oz . Package List: 1 x Solar Charge Controller 1 x User Manual (English) Note: 1. Ensure your battery has enough voltage for the controller to recognize the battery before first installation. 2. The working temperature of this controller is ‑35°C to 60°C, please keep the controller stay in cool and well ventilated place to maintain great heat dissipation during the summer day. 3. Please allowed 1‑3mm/0.04‑0.12in differences due to manual measurement, thank you.4. Due to the difference between different displays, please understand that the picture may not reflect the actual color of the item.