Features WITH 3 SENSORS --- Equipped with 3pcs120A sensors, it can accurately monitor your air conditioning, stove, water heater, washing machine, dryer, etc. MEASURING DATA --- Measure voltage, current, power factor, etc., monitor your actual electricity anytime and anywhere to prevent expensive maintenance costs. WIFI CONNECTION --- Requires 2.4GHz WiFi and internet connection to monitor energy usage through mobile applications, with quick response and high accuracy. EASY INSTALLATION --- The power clamp is lightweight and easy to install, connecting the clamp to the power cord can help you monitor power consumption. COMPACT SIZE --- The 3 phase energy meter has compact size, easy installation and operation, with external antenna, which is simple and practical. Specification: Item Type: Energy Monitor WIFI: 802.11 B/G/N20 Operating Frequency: 2.4GHz External Antenna Output Power: +20dBm CT Current: 3 x 120A Connection Voltage: 100-240V Calibration Accuracy: ≤100W (within ±2W), >100W (within ±2%) Temperature: -20-55℃ Humidity: ≤ 90% No Condensation Package List:1 x Smart Energy Meter1 x User Manual1 x Antenna4 x Accessories Note:The 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 to ensure your safety. Package List 1 x Smart Energy Meter 1 x User Manual 1 x Antenna 4 x Accessories