110/220V LW 4-digit LED DC Regulated Power Supply Voltage Current Power Display Programmable CNC Test Ageing Power With Storage Main Features: ? LED Voltage, Current and Power Display. 4-digit, accurate to 0.01V, 0.01A , and 0.001W. Support C.C. and C.V. modes. ? 2 Memory Recall Buttons. Save and recall the commonly used current/voltage. ? Programmable Control. With USB communication interface, supporting Modbus communication protocol, can be used with industrial control/server device. ? MCU Micro Computer Control. The output voltage and current can be precisely controlled by the knob. ? 5V 2A USB Charging Port. Charge your device quickly and stably. ? Intelligent Temp Control System. Multiple holes and a fan keep it cool and extend its service life. ? Safe and Stable Operation. Over temperature protection. Overload Protection. Overcurrent Protection. Over voltage protection.