Mallory Sonalert MCP320B2 Minilert Audible Signal Operating 3-20vdc 95dB 2500Hz

Description

exact item shown, Sonalert, specs below.  I tested each one at 12VDC, which is the rated voltage, they all work.  choose the quantity you want from the dropdown list.  discount (and less shipping) when you buy a bunch of them.
Piezo Buzzers & Audio Indicators CONSTANT, 9-12VDC XLOUD, 26X22MM
Removed from elevator system boards.
Resonant Frequency (Hz) 2500 ±500
Operating Voltage (Vdc) 3 ~ 20
Rated Voltage (Vdc) 12
Current Consumption Max. (mA) 20 at Rated Voltage
Sound Pressure Level Min. (dB) 95 at 30cm at Rated Voltage
Tone/Pulse Rate (Hz) Constant
Operating Temperature (°C) -20 ~ +60
Storage Temperature (°C) -30 ~ +70
Housing PC UL-94V2 UL94HB plastic resin (Color: White)
Leading Pin Tin Plated Brass
Weight (Grams) 3.8