| Image | Part Number | Manufacturer | Description |
|---|---|---|---|
 | FG-23652-P16 | Knowles | FG Series Omnidirectional Electret Condenser Microphone 1.3V 4.4kR 50uA |
 | PK-27A25WQ | Mallory Sonalert | AUDIO PIEZO INDICATOR 3-24V CHAS |
 |
| BL-21785-000 |
| Knowles |
| Omnidirectional Electret Condenser Microphone, 1.3V, 4kR Impedance, 160uA Supply Current |
 | NR-23158-000 | Knowles | Microphones 4.0 X 5.59 X 2.28MM -49 SENS, JA/JK PORT |
 | BL-21671-000 | Knowles | Microphones 7.92 X 5.59 X 2.28MM -54.5 SENS, 12S PORT |
 | SCH648R | Mallory Sonalert | 10V 18mA DC Panel Mount Piezo Alarm |
 | WP-23501-000 | Knowles | MEMS Electret Condenser Microphone 1.3V 300uA 25-Unit Bulk Pack |
 | PB-09N23P-05Q | Mallory Sonalert | 12mm DC 5V 30mA Flush Mount Audio Component |
 | AST1240MLQ | Mallory Sonalert | 3V Surface Mount Audio Component, 5mA, 4kHz |
 | AST-02308MR-R | Projects Unlimited | 23mm 8 Ohm 100mW Dynamic Speaker - Top Port, 75dB |
 | SPM1423HM4H-B | Knowles | Microphone Mems Digital Pdm Omni |
 | EK-23024-P07 | Knowles | 1.3V Omnidirectional Electret Condenser Microphone, 50uA, 4.4kR, Wire Leads |
 | AST501Q | Mallory Sonalert | AST501Q Surface Mount Piezoelectric Buzzer |
 | ZA028MAMP1 | Mallory Sonalert | AUDIO PIEZO IND 16-28V PNL MNT |
 | ZA120MAMP1 | Mallory Sonalert | ZA120MAMP1 Panel Mount Audio Component |
 | SC110HP | Mallory Sonalert | 42.85mm Black Panel Mount Piezo Alarm, 20mA, -30°C to 65°C |
 | AB2726B | Projects Unlimited | BUZZER ELEMENT STD 2.6KHZ 27MM |
 | AI-4228-P-CH16-R | Projects Unlimited | 42.5mm Dynamic Speaker, 12V, 11mA, Flush Mount, Lead Free |
 | BL-21994-000 | Knowles | BL Series Electret Condenser Microphone, 3V, 160uA, 4kR Impedance, Wire Leads |
 | PFD-27N35WQ | Mallory Sonalert | 12V 15mA DC Alarm Buzzer, 30mm Diameter, 70°C Operating |
