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GLASS BREAK

DETECTOR

GENERAL INFORMATION:

The Glass Break Detector can be placed up to 600-800ft away 

from the 

tattletale

™ base unit, depending on structures and 

objects in between it and the 

tattletale

™. It is highly sensitive to 

the sound of breaking glass and has a coverage radius of 20ft for 

plate, tempered and laminated glass. For armor coated glass, the 

coverage radius is 12ft. The Glass Break Detector may not detect 

cracks in glass, or bullets which break through the glass. 

Glass 

Break Detectors should always be used in conjunction with 

additional interior protection.

 The omnidirectional microphone 

has a 360° detection angle. The Glass Break Detector is able to 

operate normally at temperatures from -4°F to 140°F. The included 

3V CR123A Lithium battery typically lasts 2 years depending on 

activity and environmental conditions.

Mounting Instructions:

General Troubleshooting:

If there is a rapidly flashing zone light on the 

tattletale™

 

base unit that corresponds to the zone of your Glass 

Break Detector you will need to check 4 areas. 

1. 

Check that the sensor’s 3V battery is above 2.9 

volts. If not, replace. 

2. 

Check that the sensor’s battery hasn’t been 

dislodged. If it has insert the battery and press the 

black RESET button.

3.  Verify that the sensor is within range of the 

tattletale

TM

 base unit.

4.  There may be damage to the sensor that would 

require repair or replacement.

Because the sound of breaking glass travels 

directionally out from the broken window, the best 

location for mounting the Glass Break Detector is on 

a wall or other vertical surface directly opposite of the 

window to be protected, within the sensor’s range 

(12 to 20 ft depending on type of glass). 

Use the provided Dual Lock Velcro to mount the Glass 

Break Detector flush to the mounting surface, 6 to 10 

feet high. 

The Glass Break Detector may also be mounted with 

1in screws, but these are not provided. 

For optimal battery life, keep sensor away from 

sources of sound such as speakers, televisions, noisy 

kitchens, etc.

For technical support please call 1.888.TELL.ON.U or 614.540.7233

For testing instructions and directions on changing 

the battery, see reverse page. 

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