SINOTIMER DTS6619-050 80A With Switch 3-phase Tuya WiFi Energy Meter AC 380V1. DTS6619 050 049 is a three phase four wire WIFI rail type smart energy meter for measuring active energy and other parameters. 2. The meter has wifi communication function, and the meter can be read remotely using APP 3. Measure positive, negative active energy and negative energy 4. The meter displays total active energy, positive active energy, negative active energy, three phase voltage, three phase current, three phase power, three phase power