OPENMALL Wireless Guest Welcome Chime Alarm Door Bell PIR Motion Sensor for Shop Entry Company Security Protection Alarm Doorbell H7V7

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Feature:
Vocal (ding dong,) and 32 music and alarm sounds are optional, with a separate ding dong sound that can be used with a 7-9v transformer [power adapter not included]. [Note: The alarm sound is 110 alarm sound (around 95 decibels), and the music can be changed freely]. The volume of level 4 sound can be adjusted, but the alarm sound cannot be adjusted. Double sided tape and screws are randomly provided. Human body infrared thermal sensing can be used normally at night and day without being affected by the environment. It can be used as a welcome device, infrared doorbell or alarm
Summer air conditioning installation sensor reminder
If there is a place where the air conditioner is turned on, please do not install it on the door frame. The hot air outside and the cold air inside form convection, and the welcome device will sense the cold and hot convection, just like a person walking by and making a sound. Please be sure to install it in another place. The sensing window avoids the cold and hot air convection of the door, and it will work normally,
Using a 7-9V adapter for power supply, the welcome device is not working. Please install 3 batteries for testing. OK, it's just a problem with the adapter. Just replace the adapter!
Explanation on Sensitivity and Distance of Induction
Special attention should be paid when using batteries. If the battery level is low, the sensing distance will be shortened, the response will slow down, and false alarms will occur. Sensitivity will also decrease. When the battery level is severely low, the machine will sound continuously on its own. Please replace the battery immediately. The normal sensing distance is stable from 0-3 meters, and can be up to 8 meters.
About false alarm explanation
Our machine is fan-shaped induction (not linear induction, 110 degrees left and right, 45-50 degrees up and down, even on the side). We can test it against a wall for more than 10 hours and only ship it after zero false alarms. When the battery is severely low, the machine will beep continuously. Please replace the battery immediately. For first-time users of this machine, you can test the sensing window against the wall by yourself. If it beeps, please contact our after-sales service. Otherwise, please adjust the sensing window angle yourself to achieve satisfactory results.
Package including:
1Pc * Door Bell Alarm
Note:
There could be some slight differences in the color tone of the pictures and the actual item.
Please allow 1-2mm differs due to manual measurement, thanks.
No Retail Box,Packing Safely in Bubble Bag.