With power monitoring function, you can check the power usage via mobile App.
If you need the User Manual, pls download in our support center:
ZMAi-90 Tuya Wi-Fi smart electricity meter
Material: ABS plastic, 94-V0
Networking: Wi-Fi, 2.4GHz
Max current: 50A~60A
Service life: 10 years
Operating temperature: -20~50°C