Features: Quality ABS and buzzer, with long service life. Provide a loud and continuous buzzing sound at DC12V, the higher the voltages, the louder the sound. The buzzer alarm is very suitable as a good sound alarm device. Widely used in electronic products such as computers, printers, copiers, alarms, electronic toy, automotive electronic devices, telephones, timers, etc. Working voltages: The buzzer can operate at DC3-24V, with rate voltages of 12V. Specifications: Material: ABS Diameter: approx. 30mm/1.18inch Cable length: approx. 120mm/4.7inch Model Number: SFM-27 Rate voltages: 12V Voltages: 3-24V Sound pressure level: 100dB Working frequency: 3100Hz Quantity: 10pcs/set Package Includes: 10Pcs Buzzer note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.