1[PWM Charging] This solar charge and discharge controller uses system voltage level automatic identification, intelligent PWM charging method. 2[Double Button Operation] With double button design makes the operation easier and the parameter adjustment is more convenient. 3[Large Display Screen] The large display screen can be seen more clearly, including digital display, voltage, current, load identification, battery power identification, charging identification, etc. 4[Protection] Solar charge controller built in charge and discharge safety hours accumulation, battery reverse discharge, battery under voltage, battery reverse connection, overload, short circuit protection. 5[Dual USB Port] Made of ABS material, dual USB ports, more comprehensive output, in line with the needs of various electronic products, you can use it with confidence. Item Type: Solar Charge Controller Material: ABS Product Size: Approx. 167 x 90 x 35 mm / 6.6 x 3.5 x 1.4 in Voltage: 12V/24V Maximum Working Voltage: 50V Charging Mode: PWM Working Temperature: -35~+60 Waterproof Level: IP32 Support Battery Type: Lead acid battery Feature: Without power storage function Weight: Approx. 282g / 9.9oz 1 x Controller 1 x English Manual