: Mobile APP remote alarm memory Anti-dismantling design in dedicated safety field Low voltage monitoring prompt function Wireless transmission signal, easy to install Send regular online reports about the gateway When the detector is activated, it will immediately send a audible and visible alarm to deter intruders. Users can also implement APP out-of-home alert, home alert, cancel alert, emergency alarm and other operations to achieve control of wireless sound and light alarm. When the siren is used, it must be used in combination with the gateway, through the APP parameter realize the control of the wireless sound and light alarm. The communication of the whole system approves wireless transmission, which makes the installation of the product convenient and cutting Specifications: WiFi USB Siren Alarm Power supply: Mini USB , 5V-1A Backup power supply: CR123A x 2 (optional) Sound intensity:90 dB Wireless Type:2.4GHz, 1T1R Protocol:IEEE 802.11b/g/n Wireless Range:45m Free app:Tuyasmart or Smart Life. Support systems: Android and IOS Package Included: 1 x Alarm Siren, 1 x USB Cable, 1 x Manual