1. Are there any charges for data cloud? A: It's free!. 2. What APP is supported and where can I download it? A: Currently Tuya APP and Smart Life APP are supported, which can be downloaded in major application markets ( for Android, App for IOS). 3. Does this currently support computer APP? A: The WIFI version does not support computer APP, the Bluetooth version can support computer APP4. What types of mobile phones are supported? A: Currently support Android phones and phones!. 5. How big is the shunt? A: The built-in 100A shunt does not require an external CT!. 6. Is it single-phase or three-phase? A: At this is a single-phase electricity!7. Is this product a 2.4G or 5G network? A: This model is the WIFI version, supports 2.4G network, currently does not support 5G!8. Regarding the relay, what is the difference between the WIFI version and the Bluetooth version? A: Built-in 100A relay, WIFI version include relay, Bluetooth version does not include relay.9. Does the product have power-off memory? A: Data has power-off memory, switch mode has no power-off memory. the power is turned on, the relay is closed, and the screen will normally display on that the connection is not disconnected!: ELECTRICALmaterial: plasticColor as shownMeasuring Energy Range: 0-99999KWHDisplay Type: Analog and DigitalModel Number: AT2PWPower Supply: ACPhase: single phaseRated Voltage: 220VOperating Temperature: -10C~+60CAccuracy Class: 1%Max Operating Current: 80A - 99AInstallation: 35mm Din railDisplay Panel: 2.4 inches TFT-LCD HD Display Panel Graphic 240X320 RGB Dot-Wireless Type: 2.4GHz 802.11b/gPower range: Max 26.5KWEnergy Measurement range: 0 ~ 99999kWhPackage Contents:1x Din Rail Energy Meter(Due to different product batches, the appearance may be different, the functions are the same)Only the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.