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Netbell-KMB Network All-In-One Extra Loud Multi-Tone Buzzer Clock System
Source Factory internal multi tone DC piezo buzzer with 12V/24V for audio indicator on m.alibaba.com
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TOA Electronics, Inc. - Buzzer/Yelp Tone Generator
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RS PRO ≥105dB, Wire Leads Continuous, Slow & Fast Pulse Internal, Magnetic Buzzer Component, 6V dc up to 28V dc - RS Components Vietnam
12/24v Reverse Accessories Beeper Horn Vehicle Auto Warning Back Up Car Reversing Alarm Speaker Buzzer Siren With Light For Cars - Multi-tone & Claxon Horns - AliExpress
Installation Buzzer | $99.54 | Werma | Installation Buzzer, 24 V dc, Multi- Tone, Gray, 49 mm, 43 mm
Amazon.com: Linortek Netbell-KMB All-in-One Extra Loud Multi-Tone Buzzer with Programmable Web-Based Bell Timer Controller Software for Factory Warehouse Break Time Alarm Sounder System : Office Products