Features: 1.APP CONTROL: Download the "for Tuya Smart" or for "Smart Life" app to control your wifi smart alarm directly from your mobile device. Features include scheduling, automatic push notifications, and manual arming and disarming, so you can stay in control even when you're on the go. 2.WIFI CONNECTION: Your home alarm system works with for Google Assistant. You can easily control leave, disarm and home mode with your voice, freeing up your hands. No hub, WIFI connection, 2.4GHz WiFi network only, 5GHz WiFi network not supported. 3.105 DB: The loud (105 dB) vocalizer of the siren can be heard from a distance with or without the use of a cell phone and draws immediate attention. With 8 siren sounds, the button selects your favorite ringtone based on your individual preference. 4.SOUND LIGHT SENSOR ALARM: Smart siren alarm adds audible and visual alarms to your existing home system. You can add door and window sensors, motion detectors, wireless doorbells and water detectors to create an effective stand alone home apartment security system. For example, during door opening, the smart linkage and siren is triggered by sound. 5.EASY TO INSTALL: Easily set up wireless home security alarms in minutes. Use the USB power cord to plug into any electrical outlet and screw into the wall. The alarm station should always be connected to the AC adapter. Batteries (not included) are for emergency use only. specification:Item Type: Smart Siren Alarm Material: ABS Color: White Battery Type: Requires 2 x CR123 3V Batteries (not Included) Wireless Distance: 45M/49.2yd Wireless Type: 2.4Ghz Sound: 105dB Wireless Standard: IEEE 802.11b g n PackageList: 1 x SoundandLightAlarm 1 x Sticker 1 x ChargingCable 1 x Screws 1 x ScrewSet 1 x InstructionManual