864-1968, Patlite, Patlite BSV Series Panel Mount , Wall Mount Voice Annunciator, 10.8 → 26.4 V dc, 87dB at 1 m, IP54, DC, 15-Tone Patlite BSV Series Panel Mount , Wall Mount Voice Annunciator, 10.8 → 26.4 V dc, 87dB at 1 m, IP54, DC, 15-Tone