| Image | Part Number | Manufacturer | Description |
|---|---|---|---|
 | PT-2040PQ | Mallory Sonalert | Piezo Buzzer 5V 30V 1.5mA 4kHz 90dBA Through Hole Radial |
 | AOM-5244L-R | Projects Unlimited | Omnidirectional MEMS Mic, 1kR, 4.5V, Analog Output, Solder Pad |
| PK-20A38PQ |
| Mallory Sonalert |
| Piezo Buzzer 12VDC 15mA 3.8kHz Through Hole Audio Indicator |
 | AI-4329-P-SP28-R | Projects Unlimited | Audio Piezo Buzzer 4-28VDC Panel Mount 2.9kHz |
 | PKB24SPCH3601-B0 | Murata | Piezo Buzzer 3-15VDC 16mA 3.6kHz 90dB Through Hole |
 | SC628ANR | Mallory Sonalert | Piezo Buzzer 6-28VDC/VAC, 2.9kHz, 80dBA, Panel Mount Screw |
 | SMT-0727-S-R | Projects Unlimited | SMD Magnetic Transducer 2.7kHz 2-5V 120mA 12R |
 | SC616NR | Mallory Sonalert | Piezo Buzzer 6-16VDC 22mA 2.9kHz 80dBA Panel Mount Screw |
 | PK-12N40PQ | Mallory Sonalert | Piezo Buzzer 3-15VDC 5mA 4.1kHz 83dBA Through Hole |
 | AI-4228-TF-LW140-C-R | Projects Unlimited | 12V DC Audio Indicator, 2.8kHz, 10mA, Wire Leads |
 | AT-1438-TWT-R | Projects Unlimited | Audio Piezo Transducer, 1-20V, 3.8kHz, TH |
 | AST100Q | Mallory Sonalert | Piezo Transducer 4kHz 15V SMD 10nF |
 | AI-4228-P-C28-R | Projects Unlimited | Audio Piezo Buzzer 6-28VDC Panel Mount 2.8kHz |
 | SMT-1324-TW-1V-R | Projects Unlimited | SMT Audio Transducer, 1.5V, 2.4kHz, 30mA, Solder Pad |
 | AI-2304-TF-LW120-5V-R | Projects Unlimited | 4.5V DC Audio Indicator, 400Hz, 20mA, Wire Leads |
 | SMT-1640-S-2-R | Projects Unlimited | SMD Piezo Transducer, 4kHz, 1-25V, 16x16mm, 2.5mm H |
 | ZA028LDCM1 | Mallory Sonalert | Chime Tone Buzzer, 16-28VDC, 3.3kHz, Panel Mount |
 | PT-1540PQ | Mallory Sonalert | Piezo Transducer 4kHz 25V TH |
 | PK-27N26WQ | Mallory Sonalert | Piezo Buzzer 3-28VDC 15mA 2.5kHz 90dBA Wire Lead |
 | SC628A | Mallory Sonalert | Piezo Buzzer 6-28VDC/VAC 16mA 2.9kHz Panel Mount Screw |
