This single voltage and current generator is the most common electrical test tool used by electrical engineers and technicians when installing, commissioning, inspecting and maintaining electrical equipment in the field. Plug-in terminal block, wiring is safe and convenient. 4-bit digital tube with high resolution and evenly adjustable screen brightness (brightness 1-8). Aluminum handle cover, galvanized button, high quality foil, charging indicator, battery switch. Three way power supply, external power supply, DC5V micro USB, built-in lithium battery. As long as it works, you can connect it at the same time. External 15-30V DC power supply, can share 24V PLC power and other devices. Universal microUSB port for connecting to rechargeable batteries, chargers, computer USB ports, etc. On the normal operation screen, the voltage and current values are recorded, the encoder is set to record, and when you release the OK button, "..." appears on the screen, which means the registration is successful. "Reset" directly displays the saved value, no need to adjust the parameters every time you turn on the power, very convenient. Easy to carry and small size, it is the best choice for field debugging.