| Image | Part Number | Manufacturer | Description |
|---|---|---|---|
 | SC628M | Mallory Sonalert | Audio Indicators & Alerts CONSTANT, 6-28VDC MIL/RUGGED, MEDIUM |
 | SMT-0825-S-4-R | Projects Unlimited | AUDIO MAGNETIC XDCR 2.5-4.5V SMD |
 |
| EA-21939-C36 |
| Knowles |
| 1.3V 50uA Lead Free Omnidirectional Electret Condenser Microphone |
 | AST1440MATRQ | Mallory Sonalert | AUDIO PIEZO TRANSDUCER 1-20V SMD |
 | SCE028LA3CTB | Mallory Sonalert | General Purpose Piezoelectric Buzzer, 20mA, 28V, Panel Mount, -30°C to 65°C |
 | AI-4228-P-FP250-R | Projects Unlimited | 220VAC Audio Indicator, 2.8kHz, 94dBA, Panel Mount |
 | POM-2246P-C33-R | Projects Unlimited | 2V Omnidirectional MEMS Microphone, 2.2kR Impedance, 2.2mm Height, PC Pins |
 | 13400075 | Werma | General Purpose Relay, 500mA, 24V, IP65, External Mount, 91.5mm Dia. |
 | POM-2742L-2-R | Projects Unlimited | MIC COND ANALOG OMNI -42DB 6MM D |
 | AVW-15SBR-RL-24 | Projects Unlimited | 24V DC Input, 28V Max, 18V Min, Base Mount, IP54, Water Resistant |
 | AST605TRQ | Mallory Sonalert | 5V Surface Mount Piezo Alarm Transducer |
 | SCE120XA3SU2B | Mallory Sonalert | 120V 40mA Panel Mount Audio Component |
 | SMS-1508-2-R | Projects Unlimited | General Purpose SMD/SMT Component, 8R Impedance, -40°C to 85°C |
 | POM-2242P-C33-R | Projects Unlimited | Omnidirectional Electret Condenser Microphone, 2.2kR Impedance, 2V Voltage Rating |
 | SCE048LD3SU2B | Mallory Sonalert | Thread Mount Piezo Alarm, 28V-48V, 40mA, -40°C to 85°C |
 | PLD-21N30PQ | Mallory Sonalert | Black DC 12V 12mA Through Hole Chassis Mount Audio Component |
 | POM-2746P-R | Projects Unlimited | 2.7mm Diameter Omnidirectional Microphone, 2V, 500uA, Lead Free |
 | SC110P | Mallory Sonalert | Panel Mount Piezoelectric Buzzer, 2.9kHz, 120V, 19mA, Black Housing |
 | AS04008PS-4W-WR-R | Projects Unlimited | 4W 8 Ohm Oval Speaker, 380Hz, Water Resistant, Solder Lug |
 | TOM-1545L-R | Projects Unlimited | Omnidirectional Electret Condenser Microphone, 2V, 500uA, 2.2kR, Solder Pad Mount |
