Feature: 1. SOUND LIGHT ALARM: When triggered, the alarm will emit sound and light, which is greater than 90DB, you can hear the alarm anywhere in your home. 2. REMOTE CONTROL: APP can switch on and off the alarm remotely, and immediately notify your smartphone when the alarm is triggered. 3. POWER OFF MEMORY: In case of sudden power failure, the alarm will save the parameters previously set in the application program and automatically restore. 4. QUICK RESPONSE: The security alarm has ultra quick response, strong anti interference ability, ultra low power consumption, and supports 5V 1A USB power supply. 5. HIGH SAFETY: Smart wireless siren alarm can be widely used in home, kitchen, office and more occasion to ensure family safety. Specification: Item Type: Smart Siren Alarm Material: ABS Color: White Battery Type: 2 x CR123 3V Batteries (Not Included) Wireless Distance: Approx. 55m/180.4ft Wireless Frequency: 2.4Ghz Connection Mode: for Zigbee 3.0 Network Protocol: for Zigbee IEEE 802.15.4. Package List: 1 x Smart Siren Alarm1 x Sticker1 x Charging Cable1 x Screw1 x Anchor1 x User Manual