| Image | Part Number | Manufacturer | Description |
|---|---|---|---|
 | BT-21754-000 | Knowles | Microphones |
| PFD-21A29WQ | Mallory Sonalert | Audio Indicators & Alerts CONSTANT/FAST PULSE 3-24VDC, 85DB, 24X14 | |
| SCE028XA3PS1B |
| Mallory Sonalert |
| Alarm; Short Pulse, 3 KHZ, 16-28 AC/DC, 95-105 DB, 40MA, 1.69X1.41In., Terminal |
 | AST1575BMATRQ | Mallory Sonalert | SMD Piezo Transducer, 7V, 5mA, 3.65kHz, -30°C to 85°C |
| SCH628NLR | Mallory Sonalert | Audio Indicator Piezo 6VDC 28VDC 16mA 80dBA 2400Hz to 3400Hz Panel Mount Screw Bulk |
| SC616NPU | Mallory Sonalert | Audio Indicators & Alerts CONSTANT/FAST PULSE 6-16VDC, XLOUD |
| BW-21810-000 | Knowles | Microphones |
 | NR-25994-000 | Knowles | Microphones 4.0 X 5.59 X 2.28MM -49 SENS, JA/JK PORT |
 | SMT-0827-S-3-R | Projects Unlimited | AUDIO MAGNETIC XDCR 2.5-4.5V SMD |
 | SCE120LA3CTB | Mallory Sonalert | Audio Indicator Piezo 48VDC/48VAC 120VDC/120VAC 20mA 85dBA 2400Hz to 3400Hz Panel Mount Screw Bulk |
 | BT-21755-000 | Knowles | Microphones |
 | ZA016MDDP3 | Mallory Sonalert | AUDIO PIEZO IND 6-16V PNL MNT |
 | PKM17EWH2001 | Murata | Audio Sounder Piezo 7Vp-p 3Vp-p 72dB Wire Lead Bulk |
 | FB-FO-23225-000 | Knowles | Microphones NR,6mm M6 connector |
 | SMT-1324-TW-5V-R-T/R | Projects Unlimited | AUDIO MAGNETIC XDCR 4-8V SMD |
 | ZA028MAFP1 | Mallory Sonalert | MALLORY ZA028MAFP1 TRANSDUCER, ALARM, 85DBA, 28V, PANEL |
| SC616JW | Mallory Sonalert | Alarm; Warble; 68 dB(A) (Min.) @ 2 ft./6 VDC; 6 to 16 VDC; 1800 500 Hz; |
 | AST1628MATRQ | Mallory Sonalert | AUDIO PIEZO TRANSDUCER 1-25V SMD |
 | POM-5238P | Projects Unlimited | Microphones 2.2kOhm x 6mm |
 | 14-810.902 | EOZ | Piezo Buzzer 24VDC IP65 Solder Mount Round |
