door bell

Abstract: PIEZO-ELECTRIC 43mm Door sound Piezo sounder Bush 2900Hz
Contextual Info: SOUNDERS SOUNDERS, Piezo-electric SOUNDERS continued built-in drive PANEL MOUNTING Two sizes of round panel mounting sounders each with a choice of sound mode. Secured to the panel by a front screw-on outer ring. Size 36mm Size 43mm Connection by two rear 6.35mm (0.25in) fast-on tags.