Alarm Bell Ringing, Non-Adjustable Sound; Mounting Fully Enclosed Sturdy Steel Bases and Covers; Base and Cover Snap Together, No Screws Required; Designed to Operate on Either Bell Ringing Transformers or Batteries; Non-Adjustable Sound

Specifications:

Type: Non-Adjustable Volume Buzzer
Operating Voltage: 8 to 16 VAC/3 to 6 VDC
Power Supply Type: Battery/Transformer
Operating Current: 1 Ampere
Sound Intensity: 88 dB at 3 Ft
Shape: Rectangular
Housing Material: Steel
Finish: Sturdy
Size: 2-1/2 Inch W x 1 Inch D x 3 Inch H