| Image | Part Number | Manufacturer | Description |
|---|---|---|---|
 | SC628K | Mallory Sonalert | Audio Indicators & Alerts SHORT PULSE, 6-28VDC 2900HZ, MEDIUM |
 | PL-27N36WQ | Mallory Sonalert | Audio Indicators & Alerts SLOW PULSE, 3-28VDC 2.5KHZ, 90DB, 30X10 |
 | AT-2460-TWT-R | Projects Unlimited | Speakers & Transducers 85 dBA 5Vpp 5500Hz |
 | SMI-1324-TW-5V-3-R | Projects Unlimited | SMD Buzzer 5VDC 2.4kHz 30mA Surface Mount |
 | PS-520Q | Mallory Sonalert | Audio Indicator Piezo 5VDC 15VDC 200mA 12VDC 105dBA 2500Hz to 3500Hz Screw Mount Wire Lead Bulk |
 | AST-01532MR-R | Projects Unlimited | SPEAKR 32OHM 300MW TOP PORT 87DB |
| PT-2735FPQ | Mallory Sonalert | AUDIO PIEZO TRANSDUCER 3-28V TH | |
 | 7BB-27-4 | Murata | MURATA 7BB-27-4 PIEZO, DIAPHRAGM, 4.6KHZ, 27MM |
 | M2BJ-BH24D-D | Omron | AUDIO PIEZO IND 12-24V PNL MNT |
 | AOM-6742L-R | Projects Unlimited | MICROPHONE COND ANALOG OMNI |
 | AST-01508MR-R | Projects Unlimited | 15mm Dynamic Speaker 8R 300mW 1.7kHz Top Port |
 | SMT-0540-T-2-R | Projects Unlimited | AUDIO MAGNETIC XDCR 2-4V SMD |
 | SMT-0823-S-R | Projects Unlimited | SMD Magnetic Transducer 2.3kHz 3-7V 5V 70mA |
| SMT-0821-T-R | Projects Unlimited | SMD Magnetic Transducer, 2.1kHz, 2-5V, 90mA, 8.5x8.5x4mm | |
| SC616Q | Mallory Sonalert | TRANSDUCER, PIEZO, 2.9KHZ, 78DBA, 16VDC | |
 | AST-03208MR-R | Projects Unlimited | 8 Ohm 100mW Dynamic Speaker, 31.9mm Round, 82dB, Top Port |
 | PK-27A35WQ | Mallory Sonalert | Audio Indicator Piezo 3VDC 24VDC 10mA 12VDC 95dBA 3000Hz to 4000Hz Through Hole Wire Lead Bulk |
 | ANM-5254L-R | Projects Unlimited | MIC COND ANALOG NC -54DB 9.7MM D |
| AS04008PR-WR-R | Projects Unlimited | SPEAKER 8OHM 500MW TOP PORT 92DB | |
 | WP-23502-P16 | Knowles | MIC COND ANALOG NOISE CAN -52DB |
