High decibel sound and light alarm, 85dB Mobile APP remote alarm reminder Anti-disassembly dedicated security fieldWith low voltage monitoring prompt function Wireless transmission signal, easy to install Regularly send online reports to the gateway When the detector is triggered, it will immediately send an audible and visual alarm to deter intruders. Users can also use APP to realize out-of-home alert, home alert, cancel alert, emergency alarm and other operations to achieve control of the wireless sound and light alarm. When the siren is used, it must be used in conjunction with the gateway, through the APP parameter setting to realize the control of the wireless sound and light alarm. The communication of the whole system adopts wireless transmission, which makes the installation of the product convenient and fast Multiple Sound Selection Power supply: MiniUSB,5V1A Backup power supply:MiniUSB,5V1A Sound intensity: 100dB Detection temperature:-10C~80 Detection humidity: 0%~100% Wireless Type:2.4GHz Protocol:IEEE802.11b/g Wireless Range: 45m Operating temperature: 0~40(32F~104F) Humidity: 20%~85% Colour:White Material:plastic Package Contents: 1 x Alarm(without 2 x CR123A batteries) 1 x USB cable 1 x English user manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.