1、ELECTRICAL MONITORING: Equipped with three 300A sensors, the clamp meter can accurately monitor your air conditioning, stove, water heater, washing machine, dryer, etc. Support linkage with other for TUYA applications. 2、ENERGY MONITORING: Monitor your home's actual electricity anytime and anywhere to save energy. Measure voltage, current, and power factor. 3、REAL TIME ENERGY DATA: Electricity monitor needs to be used in conjunction with the gateway to monitor energy usage through mobile applications. Provide 2 second data with an accuracy of ± 2%. 4、EASY TO USE: PC321 TY power clamp is lightweight and easy to install. By connecting the clamp to the power cord, help you monitor the electricity consumption in the facility. 5、IMPORTANT SAFETY INFORMATION: Power clamp must be installed and repaired by qualified personnel. During the testing process, do not touch the terminals of the device, and turn off all power to the device before installation. Ensure your safety. 1 x 3 Phase Clamp Meter1 x Manual 1 x Antenna 1 x Antenna Base 4 x Accessory  Item Type: 3 Phase Clamp MeterMode: PC 321 Z 300 TYMaterial: ABS, MetalFor ZigBee: 2.4GHz for IEEE 802. 15.4For ZigBee: For ZigBee 3.0Operating Frequency: 2.4GHz external antennaOutput Power: +20dBmCT Current: 3 x 300AConnection Voltage: 100-240VCalibration Measurement Accuracy: Less than or equal to 100W (within ± 2W)Greater than 100W (within ± 2%)Temperature: -20 ℃ to +55 ℃Humidity: Less than or equal to 90% non condensing