It is a compact, lightweight and functional multi-meter, with large-screen LCD display, can display voltage, current, power, power factor, energy and frequency at the same time. Specifications: 2 models optional: 20A / 100A Working voltage: 110 250VAC Rated power: 20A/5000W(20A) (Default 4400W) 100A/22000W(100A) Working Frequency: 50/60Hz Frequency measuring range: 4565Hz Power measuring range: 0.01W4500W Energy measuring range: 0.01Wh99999kWh Voltage measuring range: AC 50V300V Current measuring range: 0.0120A(20A); 0.01100A(100A) Voltage precision: 1% Current precision: 2% Power precision: 2% Panel size: 90 54.5mm / 3.54 2.15in Product size: 85 47 28mm / 3.35 1.85 1.10in Package size: 100 80 30mm / 3.94 3.15 1.18in Product weight: 67g / 2.36oz Package weight: 110g / 3.88oz Notes: 1. The total power resistive load of the connected appliances cannot excess the rated power, otherwise it will be damaged, even fire. 2. 20A electrical tester is built-in shunt, if it doesn&39;t display power and the power factor, means the wiring connection is wrong, please check the wiring diagram. 3. Except for the wires, other objects should not be inserted into the connection hole; tightening the screws. 4. No waterproof function, only used in dry indoor environment. 5. Far away from children and fire. Package List: 1 Electricity Meter.