| Image | Part Number | Manufacturer | Description |
|---|---|---|---|
 | AST1109MLQ | Mallory Sonalert | AUDIO INDICATOR, 4.1kHz, 73dB, 20V; Transducer Function: Audio Indicator; Supply |
 | SC628R | Mallory Sonalert | Audio Indicator Piezo 6VDC 28VDC 18mA 68dBA 2400Hz to 3400Hz Panel Mount Screw Bulk |
| AT-2336-TWT-R |
| Projects Unlimited |
| Speakers & Transducers 12VP-P 8MA 11000PF |
 | AOM-6545L-R | Projects Unlimited | PROJECTS UNLIMITED AOM-6545L-R MICROPHONE, OMNI LEADS, 9.7MM |
 | PF-20A35EWQ | Mallory Sonalert | 12V 10mA Panel Mount Audio Component |
 | SC628J | Mallory Sonalert | Black DC Panel Mount Buzzer, 2.9kHz, 20mA, 28V, 65°C |
 | ZA028LAMP1 | Mallory Sonalert | Zener Diode 28V 40mA Terminal Block Mount |
 | ASI401Q | Mallory Sonalert | 12V 50mA DC SMD/SMT Audio Component |
 | AI-4228-TF-LW140-R | Projects Unlimited | 60mm Diameter 12V DC Panel Mount Audio Component |
 | AST-030C0MR-R | Projects Unlimited | General Purpose 100 Ohm 300mW Through Hole Speaker |
 | ZA028LACM1 | Mallory Sonalert | 22 mm panel mount, Chime Tone, 16-28 VAC/DC |
 | PT-2726PQ | Mallory Sonalert | Black 5V 1.5mA Through Hole LED |
 | AI-2304-TT-24V-R | Projects Unlimited | Audio Indicators & Alerts 400HZ 103dBA 24VDC |
 | SC616NJR | Mallory Sonalert | General Purpose Piezoelectric Buzzer, 22mA, 6V DC, Panel Mount |
 | SC628H | Mallory Sonalert | Black DC Panel Mount Speaker, 1.687inch Diameter, 65°C Operating |
 | SC628FR | Mallory Sonalert | 43mm Diameter DC-Operated Buzzer, 4mA, 28V, Panel Mount, 65°C |
 | POM-5242P-R | Projects Unlimited | MEMS Electret Condenser Microphone, 2V, 500uA, PCB Mount, 2.2kR Impedance |
 | SC628MA | Mallory Sonalert | TRANSDUCER, PIEZO, 2.9KHZ, 85DBA, 28V |
 | ZA028LDSU2 | Mallory Sonalert | 28V DC Panel Mount Transducer, 40mA, 65°C |
 | ZA028MDMT1 | Mallory Sonalert | 28V DC Rated Zener Diode, 40mA Current Rating, Panel Mount |
