Features 1、Equipped with a 2.8in TFT color LCD screen, current and voltage, phase sequence, power, and power factor are displayed on same screen. 2、Use key operation, switch machine, hold, backlight, MENU function selection keys, up, down, left, and right direction keys. 3、The needle‑nosed current clamp, the range is AC 0.1mA‑20A, the resolution is 0.1mA, and the measurement is convenient. 4、With USB interface, the stored data can be uploaded to the computer for easy analysis and management of data. 5、Simultaneously measure 2 AC voltages, currents, phases between voltages, phases between currents, phases between voltages and currents, frequency, phase sequence, active power, reactive power, apparent power, power factor. Specification Item Type: Volt-Ampere Phase Meter Material: ABS Jaw Size: Approx. 7.5x13mm / 0.3x0.5in Function: Simultaneously measure two AC voltages, currents, phases between voltages, phases between currents, phases between voltages and currents, frequency, phase sequence, active power, reactive power, apparent power, power factor, and distinguish transformer wiring groups and inductance , Capacitive circuit, test the secondary circuit and bus differential protection system, read the phase relationship between the CTs of each group of differential protection, check whether the wiring of the watt-hour meter is correct or not, and repair the line equipment, etc. Working Power Supply: DC9V 1.5V x 6 AA Battery (Battery Not Included) Working Current: When the backlight is turned on, the maximum power consumption is 135mA, and the battery works continuously for about 6 hours; when the backlight is turned off, the instrument consumes 90mA and the battery works continuously for about 9 hours. Display Mode: 2.8in TFT Color LCD Screen Range (Automatic): Voltage: AC 0.00V-600V; Current: AC 0.0mA-20.0A; Phase: 0.0°-360.0°; Frequency: 45.00Hz-65.00Hz; Active Power: 0.0W-12kw; Reactive Power : 0.0var-12kvar; Apparent Power: 0.0VA-12k VA; Power Factor: -1 - +1. Phase Sequence: Normal phase: U1, U2, U3 or I1, I2, I3 cursor flashes from left to right in sequence; reverse phase: U1, U2, U3 or I1, I2, I3 cursor flashes from right to left in sequence Data Retention: Press the HOLD key to retain the data during the test, the "HD" sign is displayed Data Storage: 500 Groups USB Interface: USB interface, upload the stored data to the computer, easy to analyze and manage the data Detection Rate: About 2 Seconds/Time Automatic Shutdown: After about 15 minutes of inactivity, the meter will automatically shut down to reduce battery consumption Backlight Function: Support, suitable for dim places and night use; Working Temperature and Humidity: -10℃-40℃; Below 80%RH Storage Temperature and Humidity: -10℃-60℃; Below 70%RH Input Impedance: The test voltage input impedance is 1MΩ Withstand Voltage: 1000V/50Hz sine waves AC voltage between the instrument circuit and the shell lasts for 1 minute Insulation: ≥10MΩ between the instrument circuit and the protective shell Structure: Double insulation, with insulating anti-vibration cover How to Use: Get the product, use a screwdriver to open the back cover, insert the battery (not included), and then plug in the cable to measure. The product is equipped with a USB data cable, which can be connected to a computer. It can view the history and usage data in real time. The measurement is accurate and very convenient. It is suitable for users to purchase and use. Package List 1 x Volt-Ampere Phase Meter (Battery Not Included) 3 x Current Clamp 4 x Test Line 1 x USB Cable 1 x CD 1 x Manual 1 x Storage Box