What our experts say WITH THE RANGE OF OPTIONS AVAILABLE and its ease of installation, this Pyronix sounder will no doubt rapidly gain the status of ‘belle’ in the eye of installers – even if it is a little rotund to conform to the dictionary definition! The Belle has a modern slimline enclosure and is designed to use the exposed parts of both lid and base as the strobe lens for maximum light output. Sound output from twin piezo sounders in SAB mode is high at 118 dBA at 1m. This is essential in a domestic bells-only situation where the neighbours’ ears are insulated by double glazed doors and windows. The internal components are all placed well away from the outer edges of the enclosure to improve resistance to vandalism. This can be further enhanced by the addition of a 1.5mm thick optional metal shroud which covers all the internal components, including the twin piezo sounders, strobe flash tube, battery and tamper switch.