Door and Window Sensor

This Door and Window Sensor uses 1 CR1632 coin cell battery and will last 3-5 years.

1.
To open the transmitter (larger piece), there is a tab on the corner of both the top and bottom of the sensor. Pry open one of those tabs to separate the two halves of the casing.

2.
To remove the battery, push on the side of the battery near the positive symbol on the battery cover to slide it out. The positive side should face up.

3.
Replace the cover by lining up the two halves and snapping them back together. You should hear an audible click to confirm the sensor is closed tightly.