| Image | Part Number | Manufacturer | Description |
|---|---|---|---|
 | AI-2429-TT-12V-R | Projects Unlimited | 12V DC Audible Signal Transducer, 2.9kHz, 8mA, Through Hole |
 | PK-21N30PQ | Mallory Sonalert | Piezo Buzzer 1.5-30VDC 12mA 2.5-3.5kHz Through Hole |
| AT-1620-TWT-12V-R |
| Projects Unlimited |
| 12Vdc Audio Transducer, 40mA, 2.048kHz, Through Hole |
 | AT-2720-TT-R | Projects Unlimited | Audio Transducer, 1V-10V, 2.048kHz, Tin Plated, Through Hole |
 | SC628ADR | Mallory Sonalert | Piezo Buzzer 6-28VDC/VAC, 1.6-2.2kHz, 60dBA, Panel Mount Screw |
 | SC110Q | Mallory Sonalert | Piezo Transducer, 2.9kHz, 120VAC, 80dBA, Panel Mount |
 | AI-4328-P-C28-2-R | Projects Unlimited | Audio Piezo Buzzer, 4-28V DC, 2.8kHz, Panel Mount, Screw Term |
 | AI-4328-P-C120D-R | Projects Unlimited | Piezo Buzzer, 20-130VDC, 2.8kHz, Panel Mount, Screw Term |
 | AI-1622-TWT-12V-R | Projects Unlimited | 12V DC Magnetic Transducer, 2.2kHz, 16mm, Through Hole |
 | AI-4228-P-SP250-R | Projects Unlimited | Piezo Buzzer, 2.8kHz, 6-250V DC, Panel Mount, Screw Term |
 | SC628 | Mallory Sonalert | Piezo Buzzer 6-28VDC 2.9kHz Panel Mount Screw |
 | AI-2437-TWT-R | Projects Unlimited | Piezo Audio Indicator, 3-16VDC, 8mA, 3.7kHz, 100dB, Through Hole |
 | PKLCS1212E4001-R1 | Murata | Piezo Buzzer 4kHz 25V Surface Mount Solder Tape/Reel |
 | AI-1223-TWT-12V-R | Projects Unlimited | Audio Magnetic Transducer 12V DC 2.3kHz 30mA Through Hole |
 | AI-4228-P-C48-R | Projects Unlimited | Audio Piezo Indicator, 10-48V DC, 2.8kHz, Panel Mount |
 | AI-2429-TWT-R | Projects Unlimited | Audio Piezo Indicator, 3-20VDC, 2.9kHz, Thru-Hole |
 | AI-4228-TF-LW140-3-R | Projects Unlimited | Audio Piezo Indicator, 3-20VDC, 2.8kHz, Wire Leads |
 | SC628ER | Mallory Sonalert | Piezo Buzzer 6-28VDC 11mA 1.9kHz Panel Mount Screw |
 | MSR320R | Mallory Sonalert | Piezo Buzzer 3-20VDC 16mA 3.5kHz 71/86dBA Through Hole |
 | AI-4328-P-C120-R | Projects Unlimited | Piezo Transducer, 2.8kHz, 120VDC, 98dBA, Panel Mount |
