ONMYST Home Security Window Door Sensor

Attention: This Link NOT Include Battery.

-Power Supply [AAA] Alkaline Battery * 2(Not included) 

Magnetic Switch Human Intrusion Detector

[1] Four-in-one alarm, continuous alarm, doorbell, and door closing reminder functions

[2] The host's low-power status LED light indicates

[3] 2 No. 7 alkaline batteries, can stand by for 2 years

[4] 108dB loud alarm sound

-When the alarm is raised, press and hold the power off button to disarm.

-The alarm has an exit time for the owner, and a variety of delay times can be set for the closing reminder.