Features:  Multi-function, which can be used to measure altering current voltage, current, active power, power factor, frequency and electric power.  Adopts LCD display, large font, with 178° wide visual angle, you can see the data clearly.  Two types optional, you can choose AC40-300V and AC250-450V according to your demands.  AC40-300V for measuring AC110V or AC220V household electricity.  AC250-450V for measuring AC380V three-phase electricity.  Easy installation, din rail mounting design, simple and convenient.  Wide applications, suitable for chemical industry, power station, automation equipment, DOS system, electromechanical device and etc..    Specifications:  Name: Power Meter  Material: plastics  Type: AC40-300V, AC250-450V (optional)  Current: AC0.00-100.0A  Frequency: 45.0Hz-65.0Hz  Active power: 0.0-30000W(AC40-300V), 0.0-45000W(AC250-450V)  Electric power: 0-99999kwh  Power factor: 0.00-1.00PF  Testing speed: 2 times per second  Item size: 54 * 64 * 80mm / 2.13 * 2.52 * 3.15in  Package size: 85 * 70 * 60mm / 3.35 * 2.76 * 2.36in  Package weight: 140g / 4.94ounce    Packing List:  1 * Power Meter