This is the plug-in meter, it could read energy consumption for each in house appliance. It consist internal relay to remote connect/disconnect upon time setting. Meter with RF module, it could send the data to the PC. It is used for monitoring energy consumption for home appliances (air condition, fridge, wash machine and so on) easily at any time in order to make energy saving. ♦RF Communication ♦Relay Main Specification: Voltage: 100V/200V Frequency: 50Hz Max. Current: 15A Display mode: LCD4+2 Constant: 10000imp/kWh Connection mode: Direct Mode Meter Size: 129.5*72*65.3mm Standard: IEC62052-11, IEC62053-21