| Image | Part Number | Manufacturer | Description |
|---|---|---|---|
 | AI-380 | Projects Unlimited | Audio Indicators & Alerts PZ 105dB2800HZ 28VDC |
 | SPU0409LE5H-QB | Knowles | MICROPHONE MEMS ANALOG OMNI |
 |
| PS1240P02CT3 |
| TDK |
| Audio Buzzer Piezo 30Vo-p 3Vo-p 60dBA Through Hole Pin Ammo |
 | BT-21835-000 | Knowles | Microphones |
 | ZA028LACT | Mallory Sonalert | Audio Indicator Piezo 16VDC/16VAC 28VDC/28VAC 40mA 85dBA 2800Hz to 3800Hz Panel Mount Bulk |
 | ZA028LDCT | Mallory Sonalert | Audio Indicator Piezo 16VDC 28VDC 40mA 85dBA 2800Hz to 3800Hz Panel Mount Bulk |
 | SCL016MD3CTB | Mallory Sonalert | Audio Indicator Piezo 6VDC 16VDC 20mA 75dBA 2400Hz to 3400Hz Panel Mount Bulk |
 | BT-23357-095 | Knowles | Microphones |
| ZA028SACT | Mallory Sonalert | MALLORY ZA028SACT TRANSDUCER, ALARM, 75DBA, 28V, PANEL |
 | AI-4228-P-C28 | Projects Unlimited | Audio Indicators & Alerts 12VDC 2800Hz 88dBA |
 | SPM0410HR5H-PB | Knowles | MICROPHONE MEMS ANALOG OMNI |
| PF-27N36WQ | Mallory Sonalert | TRANSDUCER, PIEZO, 3.5KHZ, 90DBA, 28VDC |
| BW-21784-000 | Knowles | Microphones |
 | FG-23742-D65 | Knowles | Microphones Omni-Directional Microphone |
 | FG-23629-P25 | Knowles | Microphones Omni-Directional Microphone |
 | PT-1240PEQ | Mallory Sonalert | Audio Indicator Piezo 30Vp-p 2mA 5Vp-p 80dBA 3500Hz to 4500Hz Through Hole Pin Bulk |
 | BRP2304L-30 | International Components | Audio Piezo 30Vp-p 10Vp-p 80dB 5000Hz to 6000Hz Flange Mount Wire Lead |
| SC628MH | Mallory Sonalert | Audio Indicators & Alerts CONSTANT, 6-28VDC MIL/RUGGED, 4500HZ |
 | PB-1408-1 | Soberton | Piezo Buzzer, 12V DC, 4kHz, Through Hole, 7.5mm H |
| VEK-F-30460-000 | Knowles | Microphones 1MM, OMNI, 10MM WIRE 16MM DIA, 3 WIRE |
