| Image | Part Number | Manufacturer | Description |
|---|---|---|---|
 | SCE120XA3CTB | Mallory Sonalert | Audio Indicators & Alerts CONSTANT 30-120V, 3KHZ, XLOUD |
 | PKM17EPPH4001-B0 | Murata | Audio Sounder Piezo 25Vp-p 3Vp-p 72dB Through Hole Pin Bulk |
| AT-1220-TT-2-R |
| Projects Unlimited |
| Speakers & Transducers 1.5V 75dBA 2048Hz |
 | SC250F | Mallory Sonalert | Audio Indicator Piezo 60VDC/60VAC 250VDC/250VAC 4mA 2400Hz to 3400Hz Panel Mount Screw Bulk |
 | SC110HR | Mallory Sonalert | Audio Indicator Piezo 30VDC/30VAC 120VDC/120VAC 20mA 68dBA 4000Hz to 5000Hz Panel Mount Screw Bulk |
 | POW-2742L-C3310-B-R | Projects Unlimited | Microphones -42DB 2VDC .5MA 2.2KOHM |
 | POW-2242L-C3310-B-R | Projects Unlimited | Microphones -42DB 2VDC .5MA 2.2KOHM |
 | SC616CPR | Mallory Sonalert | Audio Indicator Piezo 6VDC 16VDC 16mA 68dBA 2400Hz to 3400Hz Panel Mount Screw Bulk |
 | AOM-4544L-R | Projects Unlimited | MICROPHONE COND ANALOG OMNI |
 | POW-1644L-B-R | Projects Unlimited | MEMS Mic Omnidirectional Analog 2V 2.2kR IP57 |
 | POW-2742P-C3310-B-R | Projects Unlimited | Microphones -42DB 2VDC .5MA 2.2KOHM |
 | PK-21A31PQ | Mallory Sonalert | Radial Piezo Indicator, 3-24V DC, 3kHz, 18mA, Through Hole |
 | POM-2740P-C33-R | Projects Unlimited | Microphones 2.2kOhm x 6mm |
 | SMI-1324-TW-5V-R | Projects Unlimited | Audio Indicators & Alerts |
 | SC110KR | Mallory Sonalert | TRANSDUCER, PIEZO, 2.9KHZ, 80DBA, 120V - More Details |
 | POM-2244L-C33-R | Projects Unlimited | Microphones CONDENSER 2.2 X 6mm |
 | PF-20A35EWQ | Mallory Sonalert | MALLORY PF-20A35EWQ TRANSDUCER, PIEZO, 3.5KHZ, 95DB, 24VDC |
 | ZA028MDCM1 | Mallory Sonalert | Audio Indicators & Alerts 16 to 28 VDC 3300 +/- 500 Hz |
 | ZA028LDSR8 | Mallory Sonalert | 22 mm panel mount, Fast Siren, 16-28 VDC |
 | SC110DPR | Mallory Sonalert | Audio Indicator Piezo 30VDC/30VAC 120VDC/120VAC 20mA 60dBA 1600Hz to 2200Hz Panel Mount Screw Bulk |
