Guide Rail Slot Installation: Standard guide rail installation, no screws, mounting, convenient and easy to install. Wide Applications: Suitable for high and low power distribution cabinets, display cabinets and racks, factory assembly lines, corporate warehouses, rental apartments, companies, shopping malls, hotels, family homes, and so on. Name: Energy Meter Voltage measurement ranges:170-270V Current measurement ranges:0-63A Power measurement ranges:0-17KW Timing measurement ranges:0-999Hrs Electricity measurement ranges:0-9999Kwh Temperature rangeminus:20-150 Frequency measurement ranges:50-60Hz Power factor:0.00-1.00PF Type:B:No WIFI, no power-off function Model:KWS-302 Colour:White Material:Plastic Size:66x66x82mm or 2.60x2.60x3.23in Package Contents: 1 x Energy Meter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.