What batteries does the Glass Break Sensor use?

This Glass Break Sensor takes 1 CR123A battery and the typical battery life for the sensor is 3-5 years. 

• Open the Glass Break Sensor by unscrewing the Philips head screw on the bottom of the Sensor.
• Replace the CR123A battery.  Make sure to follow the polarity requirement.
• Once the new batteries are placed, place the front cover back on the face of the sensor and tighten the screw back in.

This Glass Break Sensor takes 2 CR123A batteries and the typical battery life for the sensor is 3-5 years.

• Open the Glass Break Sensor by unscrewing the Philips head screw on the side of the Sensor.
• Replace the two CR123A batteries.  Make sure to insert the new batteries with the 2 positive ends facing towards each other.
• Once the new batteries are placed the sensor, place the front cover back on the face of the sensor and tighten the screw back in.

This Glass Break Sensor takes 2 CR123A batteries and the typical battery life for the sensor is 3-5 years.

• To open the cover, put one thumb over the speaker and one thumb over the LED light, then grip unit by the sides with your fingers and press down with your thumbs.
• Replace the two CR123A batteries making sure to insert the new batteries with the positive ends facing towards each other.
• When replacing cover, you will notice a spring with a screw connected to it. This needs to be pushed straight down when the cover is closed otherwise the unit will report a tamper. When you close the cover you should try to position it over the screw and push all 4 corners straight down at the same time.