Features Can measure AC voltage/current/power/frequency/power factor/electric energy on this one meter. Low power consumption, high stability, high accuracy. The appearance adopts standard size, more convenient to install. Adopts the digital LCD display with adjustable blue backlight, which is more clear and convenient to read data. Self-calibration voltage, current error and other options can be set by pressing the key. It has alarm functions of upper and lower limits of voltage, current, power and timeout to ensure safety. Features: 1. Can measure AC voltage/current/power/frequency/power factor/electric energy on this one meter.  2. Low power consumption, high stability, high accuracy. The appearance adopts standard size, more convenient to install. 3. Adopts the digital LCD display with adjustable blue backlight, which is more clear and convenient to read data. 4. Self-calibration voltage, current error and other options can be set by pressing the key. 5. It has alarm functions of upper and lower limits of voltage, current, power and timeout to ensure safety. Specification:  Item Type: Voltage Current Tester Material: Plastic Optional Type: #1 AC20A direct detection, #2 AC100A separated type, #3 AC100A open type, #4 AC200A separated type, #5 AC500A open type Power Supply Voltage: DC8-18v (24V optional) Measurement Accuracy: 0.5% ±2 words Measurement Rate: Fast/Standard/Slow Operating Temperature: -10-+50℃ Working Pressure: 80-106kPa Working Humidity: 10-80% Size: Approx.79 x 43 x 27mm / 3.1 x 0.9 x 1.9in Package List:   1 x Voltage Current Tester 1 x Mutual Inductor Note:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Package List