| Image | Part Number | Manufacturer | Description |
|---|---|---|---|
 | 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 |
 | POW-2742P-C3310-B-R | Projects Unlimited | Microphones -42DB 2VDC .5MA 2.2KOHM |
| SC250F | Mallory Sonalert | Audio Indicator Piezo 60VDC/60VAC 250VDC/250VAC 4mA 2400Hz to 3400Hz Panel Mount Screw Bulk | |
 | AOM-4544L-R | Projects Unlimited | MICROPHONE COND ANALOG OMNI |
 | 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 |
 | SC616CPR | Mallory Sonalert | Audio Indicator Piezo 6VDC 16VDC 16mA 68dBA 2400Hz to 3400Hz Panel Mount Screw Bulk |
 | POW-2242L-C3310-B-R | Projects Unlimited | Microphones -42DB 2VDC .5MA 2.2KOHM |
| PUM-3046L-R | Projects Unlimited | MIC COND ANALOG UNI -46DB 6MM D | |
 | PK-21A31PQ | Mallory Sonalert | Radial Piezo Indicator, 3-24V DC, 3kHz, 18mA, Through Hole |
 | PS-551Q | Mallory Sonalert | BUZZER PIEZO 2.8KHZ BRACKET |
 | POM-2740P-C33-R | Projects Unlimited | Microphones 2.2kOhm x 6mm |
 | SMI-1324-TW-5V-R | Projects Unlimited | Audio Indicators & Alerts |
| AVW-15SBR-RL-24 | Projects Unlimited | SIREN PIEZO IND 18-28V BASE | |
 | SC110KR | Mallory Sonalert | TRANSDUCER, PIEZO, 2.9KHZ, 80DBA, 120V - More Details |
 | POM-2244L-C33-R | Projects Unlimited | Microphones CONDENSER 2.2 X 6mm |
| PB-0627PE-05AQ | Mallory Sonalert | Speakers & Transducers XDUCR, 4-5VPP 2731HZ, 6.6X3.1MM | |
| AUM-5247L-R | Projects Unlimited | Microphones 680 ohm X 9.7mm | |
 | PF-20A35EWQ | Mallory Sonalert | MALLORY PF-20A35EWQ TRANSDUCER, PIEZO, 3.5KHZ, 95DB, 24VDC |
