| Image | Part Number | Manufacturer | Description |
|---|---|---|---|
 | SC250R | Mallory Sonalert | Piezo Buzzer 60-250V AC/DC, 2.9kHz, 18mA, Panel Mount Screw |
 | PK-21N30WQ | Mallory Sonalert | Piezo Transducer, 3kHz, 30VDC, 12mA, Panel Mount |
 |
| AI-4228-TWT-R |
| Projects Unlimited |
| Piezo Indicator, 3-28VDC, 2.8kHz, 10mA, Thru-Hole |
 | PT-3534FPQ | Mallory Sonalert | Piezo Buzzer 3-28VDC 12mA 3.4kHz 105dBA Panel Mount |
 | AI-1622-TWT-5V-R | Projects Unlimited | 5V DC Audio Indicator, 2.2kHz, 30mA, Through Hole |
 | POM-3546L-R | Projects Unlimited | MEMS Condenser Mic, Analog, Omnidirectional, 6mm, 2.2kR, 2V |
 | PS-562Q | Mallory Sonalert | DC Buzzer 5-15VDC 40mA 100dB 2.5kHz Wire Lead Flange Mount |
 | AI-2438-TT-R | Projects Unlimited | Audio Piezo Indicator, 8-18V DC, 3.8kHz, Through Hole |
 | AI-4228-TF-LW140-FP-R | Projects Unlimited | Piezo Indicator, 3-20V DC, 2.8kHz, 10mA, Wire Leads |
 | AI-2332-TWT-12V-R | Projects Unlimited | 12V DC Audio Indicator, 3.2kHz, 85dB, 13mA, Through Hole |
 | MSR516NR | Mallory Sonalert | Piezo Buzzer 5-16VDC 14mA 3.9kHz 88-96dBA Through Hole |
 | PB-12N23P-03Q | Mallory Sonalert | Magnetic Indicator, 2-5V DC, 2.3kHz, 12mm Dia, Through Hole |
 | AI-1440-TWT-12V-R | Projects Unlimited | 12V DC Piezo Indicator, 4kHz, Through Hole |
 | AI-4228-P-C18-R | Projects Unlimited | Piezo Buzzer, 7-18V DC, 2.9kHz, Panel Mount, Screw Term |
 | AI-3736-P-C28-R | Projects Unlimited | Piezo Buzzer, 4-28VDC, 3.6kHz, Panel Mount, Screw Term |
 | AI-4228-P-C120-R | Projects Unlimited | 110VAC Audio Indicator, 2.8kHz, 94dBA, Panel Mount |
 | AI-3245-TF-LW95-R | Projects Unlimited | Piezo Indicator, 3-28V DC, 4.5kHz, Wire Leads |
 | PKLCS1212E40A1-R1 | Murata | Piezo Buzzer 25V 3V 4kHz 75dB SM T/R |
 | AI-4228-P-SP120-R | Projects Unlimited | 110VDC Audio Indicator, 2.8kHz, 92dBA, Panel Mount |
 | AI-2429-TWT-12V-2-R | Projects Unlimited | Magnetic Buzzer, 3-20V DC, 2.9kHz, 8mA, Thru-Hole |
