Introduction;
Infrared detection (detection angle of 110 degrees， 6-8 meters away)， so welcoming doorbell when someone enters the detection zone， ie automatic speech 拨放 once - when the "BUZZ Welcome" to do "infrared alarm"， boot delay fortification 10-15 seconds after the formal entry into the security state， but someone enters a guard zone automatic alarm immediately， delay 30 seconds after the alarm sounds automatically stops， but still in the security state， it was re-entering the alarm again.

Instructions: Replace the three AA1.5V battery， or plug in an external power supply to work.
We carefully design eliminates the trouble you just need to remove the battery to insert an external power supply that is able to automatically disconnect the battery connector is protected when the external power plug disconnect batteries that can be automatically entered to work.

Product parameters:

Voltage: 4.5V (three 5 batteries bring your own)， it can be an external power supply: DC 6-12V (bring your own)