Ajax Home Internal Siren - Black

Part Number: AJ-HOME-SIREN-B Categories , , ,

The Ajax Internal Siren is designed to emit an internal alarm during detector activation. It is installed indoors to warn of danger or deter intruders.

  • Authentication to prevent forgery
  • Jamming detection and communication channels encryption
  • Tampering alarm
  • Indicates armed/disarmed state by means of a built-in LED
  • An external LED is connected to the siren, if necessary
  • Customizable sound level and alarm length during detector activation
Notification Type Acoustic and LED
Notification Volume Output 81 – 105 dB at a distance of 1 m (adjustable)
Operating frequency of the buzzer 3.4 ± 0.5 kHz
Tamper Protection Yes

Frequency Band

868.0 – 868.6 MHz or 868.7 – 869.2 MHz depending on the region of sale


Operates only with all Ajax hubs, and range extenders

Maximum RF output power

Up to 25 mW

Radio signal modulation


Radio signal range

Up to 2,000 m (any obstacles absent)

Battery Supply

2 × CR123A, 3 V

Battery Life

Up to 5 years

Socket for connecting
an external light indicator
Yes (power supply 3 V, 10 mA)
Body protection level IP50
Installation method Indoors

Operating temperature range

From -10°С to +40°С

Operating humidity

Up to 75%

Overall dimensions

75 × 76 × 27 mm


97 g


Security Grade 2, Environmental Class II in conformity with the requirements of EN 50131-1, EN 50131-4, EN 50131-5-3