Alarm Unit only, with batteries
 
Specifications, Alarm Unit
 
○  Size 2.7" high x 2.3" wide x 1.1" deep (69mm x 60mm x 29mm)
○  Weight: 3 ozs ( 85 grams) with batteries
○  Powered by 3 replaceable AAA batteries (included). Life expectancy > 1 year. Unit beeps ~ every 30 seconds when battery low
○  Alarm duration: ~ 9 seconds; red lite blinks until unit power is reset
○  Alarm amplitude: High setting 105 to 110 dB at 10 cm distance. Low setting 90 to 95 dB at 10 cm distance
Alarm frequency: 2.8 to 4.2 kHz​​
Includes P/N 4029 Alarm Monitor