| Image | Part Number | Manufacturer | Description |
|---|---|---|---|
 | SC648AHR | Mallory Sonalert | Audio Indicators & Alerts CONSTANT, 10-48VAC 4500HZ, MEDIUM |
 | POM-2246S-2 | Projects Unlimited | Microphones 2.2kOhm x 6mm |
| PK-27N35EPQ |
| Mallory Sonalert |
| AUDIO PIEZO IND 3-28V PNL MNT |
 | AT-152 | Projects Unlimited | Speakers & Transducers PZ 80dB 4000H 15Vpp |
| SC648A | Mallory Sonalert | Audio Indicator Piezo 10VDC/10VAC 48VDC/48VAC 16mA 68dBA 2400Hz to 3400Hz Panel Mount Screw Bulk |
 | AI-4228-P-SP28D | Projects Unlimited | Audio Indicators & Alerts 12VDC 2800Hz 90dBA |
 | POM-2245L-C10-R | Projects Unlimited | MIC COND ANALOG OMNI -45DB 6MM D |
 | SMT-9403D | Projects Unlimited | Speakers & Transducers EM 87DB 2700H 3.6Vpp |
 | FB-EM-30346-000 | Knowles | Microphones 1M, OMNI, 167MM LONG 60MM WIRE, 5.4 DIA |
 | PUM-5250L | Projects Unlimited | Microphones 2.2kOhm X 6mm |
 | AST1240MLQ | Mallory Sonalert | Speakers & Transducers XDUCR, CUT TAPE 4KHZ, 75DB, 12X12X3 |
 | PL-21N30PQ | Mallory Sonalert | Audio Indicators & Alerts SLOW PULSE, 3-28VDC 3KHZ, 80DB, 24X9.5 |
| AOM-4540P | Projects Unlimited | Microphones 2.2kOhm x 9.7mm |
| SCE028SD3CTB | Mallory Sonalert | Audio Indicators & Alerts CONSTANT 16-28VDC, 3KHZ, SOFT |
| AOM-6746P | Projects Unlimited | Microphones 2.2kOhm x 9.7mm |
| PT-1250WQ | Mallory Sonalert | Audio Indicators & Alerts XDUCR, PIEZO, 4.8KHZ 80DB, NO FLANGE |
 | FG-23652-D17 | Knowles | Microphones Omni-Directional Microphone |
| PKM17EPPH4002-B0 | Murata | Audio Indicators & Alerts 3Vp-p,4kHz square wave,10cm |
 | PLD-27A35PQ | Mallory Sonalert | DC Buzzer Pin Selectable 3.5kHz Piezo (with Feedback) 3 ~ 24V 95dB @ 12V, 30cm |
 | POM-1844L-C33-R | Projects Unlimited | Microphones 2.2kOhm x 6mm |
