Description: The solar charger controller is compatible with 12V or 24V system automatically. Dual USB 5V/3A output ports support mobile phones, tablet PCs or other devices that require 5V voltage. Complete 3 stage MPPT tracking charging, high charging efficiency, charging process does not stop detection, two way focus tracking. Built in overheating, overcurrent, short circuit, open circuit protection, fault elimination, controller automatic recovery Backlit LCD display that can clearly indicate the status and data is able to switch modes and parameter configuration. Easy to set up and operate, suitable for home, industrial, commercial, etc. Specification: Material: plastic electronic components Color: White Voltage: DC 12V / 24V Display: LCD screen Size Chart: Size: 133.5x70mm/5.26x2.76inch Inner hole distance: 126x50.5mm/4.96x1.99inch Package Includes: 1 Piece Solar Charge Controller