Features： 1、Low Power Consumption: The power supply adopts ultra low power consumption chips to reduce static standby power consumption and energy consumption. 2、High Efficiency: This is a compatible MPPT intelligent efficient charge controller, it has efficient charging function to automatically track the maximum power point, 10%?30% higher than the ordinary controller charging efficiency. 3、Real Time Display: All kinds of real time data are displayed on a display screen, which is convenient for users to check at a glance. 4、Good Heat Dissipation: This solar charge controller is used for USB 5V output for mobile phone and fan charging, dual period control mode, and good heat dissipation performance. 5、 Performance: This solar controller is made of aluminum and ABS, it is sturdy and durable, with performance and long service life. Specification： Item Type: Solar Controller Material: Aluminum, ABS Gross Weight: 506g / 17.8oz Product Size: Approx.18.8 x 9.6 x 6cm / 7.4 x 3.8 x 2.4in Voltage: 12V 24V T40A Style: 500W(12V) 1000W (24V) Operating Temperature: -10 DegreeC~60 DegreeC Storage Temperature: -30 DegreeC~70 DegreeC Purpose: solar controller Package List： 1 x Solar Controller 5 x Expansion Tube 5 x Short Screw 5 x Long Screw 5 x Nut 1 x Instruction Manual 1 x DC Head