1. High reliability semiconductor sensor 2. Uses powerful microprocessor control 3. Mobile remote APP connection, compatible with tuya connect app 4. Connect to tuya app of G205 or MAX21 alarm for remote notifications 5. Report on Real time of detected gas concentration 6. Voice alarm prompt 7. Can remotely control the machine hand (valve switch) Features: Working voltage: AC100-240V Network: WIFI-2.4GHz Average power consumption: 3W