Small Magnetic Door and Window Alarm/Chime

This small magnetic reed switch senses when a door or window opens and can alert you with either an alarm or chime. This makes it suitable for both security purposes or for notifying you when customers arrive at your business. Features 4 modes of operation; Intruder Alarm, Entry Doorbell, Open Alarm and Door/Window Open Reminder. Simple two piece design attaches with double sided tape. Requires 2 x AAA batteries. Size: 100H x 30W x 20Dmm.

The Door and Window Alarm/Chime has 4 Modes:
Intruder Alarm - When the door is opened, alarm sounds for 1 minute or until SET button is pressed.
Entry Doorbell - After the door is opened, the alarm makes a ding-dong sound then stops.
Open Alarm - While the door remains opened, the rapid fire alarm sounds until door is closed again.
Open Reminder - While the door is opened, a slowly amplifying chime sounds until it is closed.