| Image | Part Number | Manufacturer | Description |
|---|---|---|---|
 | POM-5246P | Projects Unlimited | Microphones 2.2kOhm x 6mm |
| TOM-3044L-R | Projects Unlimited | Microphones 2.2kOhm X 6mm | |
| Projects Unlimited |
| Microphones 2.2kOhm x 6mm |
 | SC628NP | Mallory Sonalert | Audio Indicator Piezo 6VDC 28VDC 16mA 86dBA 2400Hz to 3400Hz Panel Mount Quick Connect Bulk |
 | MD9752NSZ-1 | Knowles | MIC COND ANALOG NC -40DB 9.7MM D |
 | INMP522ACEZ-R7 | TDK | MICROPHONE MEMS DIGITAL PDM OMNI |
| TOM-3050L | Projects Unlimited | Microphones 2.2kOhm x 4.5mm |
 | SNP2 | Mallory Sonalert | AUDIO PIEZO IND 1-5V PNL MNT |
| AOM-4546L | Projects Unlimited | Microphones 2.2kOhm x 9.7mm |
| BT-21751-000 | Knowles | Microphones |
| RB-120 | NTE Electronics | Audio Buzzer 120VAC 74dB Screw Mount Solder Lug |
| POM-2740L-C33-R | Projects Unlimited | Microphones 2.2kOhm x 6mm |
 | POM-2735P | Projects Unlimited | Microphones 2.2kOhm x 6mm |
 | PF-27A25PSQ | Mallory Sonalert | AUDIO PIEZO INDICATOR 3-24V TH |
 | SC110HP | Mallory Sonalert | Audio Indicator Piezo 30VDC/30VAC 120VDC/120VAC 20mA 68dBA 4000Hz to 5000Hz Panel Mount Screw Bulk |
 | AOM-5242L | Projects Unlimited | Microphones 2.2kOhm x 9.7mm |
 | AOM-4542L | Projects Unlimited | Microphones 2.2kOhm x 9.7mm |
 | SC628EJ | Mallory Sonalert | Audio Indicator Piezo 6VDC 28VDC 28mA 50dBA/62dBA 1600Hz to 2200Hz Panel Mount Screw Bulk |
| POM-2245L-C33-R | Projects Unlimited | MIC COND ANALOG OMNI -45DB |
 | AOM-5242L-R | Projects Unlimited | Microphones 2.2kOhm x 9.7mm |
