Features Excellent Performance: This AC multifunction digital meter has low power consumption, high stability, and high accuracy. The design features a standard size for easy installation. Perfect Application: This digital voltmeter can measure AC voltage, current, power, frequency, power factor, and electric energy in a single device. Multi-Function: This frequency power factor multimeter includes alarm functions for upper and lower limits of voltage, current, power, and timeout to ensure safety. Self-calibration of voltage and current errors, along with other settings, can be adjusted using the button controls. Easy to Use: This current tester features a digital LCD display with adjustable blue backlight, providing clear and convenient data reading. Product Specification: Power supply voltage is DC8-18V (24V optional). Measurement accuracy is 0.5% ±2 digits. Size is approximately 79 x 43 x 27mm / 3.1 x 0.9 x 1.9in. 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 digits Measurement Rate: Fast/Standard/Slow Operating Temperature: -10 to +50°C 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 1 x 2PIN 2-line 1 x 3PIN 2-line 1 x 200A Transformer Note: Please note that the new or old version of this product may be shipped randomly. Ensure you are comfortable with this before placing your order.