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. APP Function (Only KWS-302WF Support): Cellphone Remote APP Control: Download SmartLife APP or graffiti intelligent APP connection, realize WIFI network cloud remote intelligent control. Where there is signal, you can control the device whenever and wherever you want, unlimited distance. APP Timing Function: Countdown function, you can add multiple sets of time data in the mobilephone APP to set the power on. Device Sharing: Share management, multi-person control, support a one cellphone to control multiple switches, at the same time you can share multi-person control. Power Failure Protecting Function (KWS-302WF Support): Support over-voltage, under-voltage, over-current, over-power, over-temperature, power failure protections setting, and screen hibernation setting. 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:A:With WIFI and power-off function Model:KWS-302WF 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.