Fangrui Product Details 1. Dy-mc400a Wifi Smart Linkage Home Door And Window Detector, Support Voice Control & App Remote Control 2. Real-time Monitoring Of Door And Window Switch Status. 3. When The Doors And Windows Are Opened, The Door Sensor Immediately Senses And Sends A Notification Or Linkage With The Smart Home. 4. Support Mobile Phones To Remotely View The Movements At Home. 5. Smart Linkage Home, Remote Control Air Conditioner On Off, Lights On, Lights Off, Etc. 6. Support Voice Control. 7. Product Parameters: 8. Input Voltage: Dc 3v Lr03. 9. Quiescent Current: Less Than Or Equal To 10 Microamperes. 10. Alarm Current: Less Than Or Equal To 160ma. 11. Low Voltage And Under Voltage: Less Than Or Equal To 2.7v. 12. Wifi: 802 1 1b G N. 13. Magnetic Control Distance: Greater Than Or Equal To 15mm. 14. Working Temperature: -10-50 Degrees Celsius. 15. Working Humidity: Rh Max.