Cranford Controls Combi 32 Series Surface Mount Electronic Sounder, 15 → 30 V dc, 86 → 106dB at 1 m,

The Cranford Controls VTB sounder is a 32-tone, electronic alarm with a sound level output ranges between 86 and 106dB (A) at a distance of up to 1m. The VTB combined unit offers a wide range to the fire and security markets. It can easily be retrofitted in place of a VTG sounder on existing systems without any additional power supply considerations. This is especially beneficial where the disability discrimination act calls for visual indication. The synchronisation of light output is standard, as is the option to operate the VTB as a flasher/ beacon only.
Warning:
Please refer to the RS website for FIA Guidance on Visual Alarm Devices (VAD) regarding the conflict between BS 5839 and EN 54-23.

Fully synchronised LED light and sound output
3 volume settings via PCB mounted DIL switch
2-stage alarm
Operating temperature ranges between -20°C and 70°C
Universal locking using industry standard grub screw

Indicate a fault
Emergency evacuation

BS5839
EN54
CE certified
ANSI/ESD S20.20:2014
BS EN 61340-5-1:2007