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Twin Alert Internal Sounder


The Twin Alert combines both a speaker and siren in a single unit. This eliminates the need for two separate products situated in different locations, optimising installation efficiency.

Key Features
  • Tamper protection
  • 100dB loudness
  • Compatible with any panel featuring a speaker output

Product Features

Combined speaker and sounder

The speaker element mimics keypad tones and the sounds associated with the setting and unsetting of a system. The internal sounder will only activate on alarm and overrides the pre-set speaker volume level, providing a siren output of 100 decibels at 1 metre, acting as a deterrent to intruders and alerting inhabitants.

Tamper protection

The integral tamper protection means that the alarm will be sounded if anyone tries to disconnect the Twin Alert.

Engineer hold off

With the Engineer hold off feature you can disable the tamper through the engineer menu on the control panel enabling the system to be maintained without any unwanted alarms.

Sounders technical characteristics


100dB @ 1m

Engineer hold off


Number of Piezos


Tamper protection


For internal use


Environmental and operating features

Storage temperature

-20C to +60C

Certified operating temperature

-10C to +40C

Nominal operating temperature

-10C to +40C

Physical dimensions (H x W x D)

90 x 90 x 46mm



Electrical & battery

Operating voltage

9-14.5V (13.5V nominal)

Alarm current


Quiescent current consumption

30mA 12V

Certifications and warranty

Security Grade

Grade 2

Environmental class


EN Certificate

EN50131-4:2009, EN50131-1:2006+A1:2009, PD6662:2010

Certification type

Self certified

Electrical conformity



2 years

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Twin Alert Internal Sounder
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