Fangrui Product Details Tuya Wifi Door Sensor Home Security Alarm System 90db Scene Alert Tuya Smart Life App Control Works With Alexa Google Home Description: Compatible With Alexa & Google Assistant: Simply Use Your Voice To Control The Connected Devices By Alexa Or Google Assistant. Loud Siren When The Sensor Is Triggered, An Alarm Sound Of 90db Loudness Will Sound. Wifi Connection Connect To Router Through Mobile App Settingsthen You Can Remote Control Anywhere Anytime . App Control The App Lets You Know What's Going On In Your Home And Protect/unprotect Your System Anytime, Anywhere. App Pushes Alarm Information Let You Know The Alarm Information In An Instant Low Battery Alert 2 Pcs Aaa 1.5v Battery Does Not Includecan Work For 3-6 Months. You Can Put It In Many Places. Put It On Every Door In Your House And Give Them A Name So You Know Exactly Which Door Has Been Opened. You Can Also Install It In Your Windows, Drawers, Etc Logs About Sensor You Can View The Log Of The Sensor Being Triggered In The App. Specifications: Input Voltage: Dc3v Lro3 Quiescent Current: ≤55ua Alarm Current: <180ma Low Power Undervoltage:≤2.4v Wifi Standard: 802.11b/g/n Magnetic Control Distance: <15mm Alarm Decibel: <90db 1meter Working Temperature:-10~ 50