Are you looking for a professional, yet piezo ? Are you in search of a sturdy, trustworthy tool that can do multiple works at once? , ! Our professional piezo must meet your needs. It is one of the for you. Features -Color: Black -Material: PPO -Size: 2.20X2.20X1.00cm/0.86X0.86X0.39in - Multivibrator vibrates and outputs audio signal. An impedance drives piezoelectric sound. - Connected to rated power and the will sound continuously. - Electronic alarm with cable, which is made of insulation material. - Use for alarming you, make no defect to your health, which is the better item for your life and work. - Adopts precision production to stable characteristics and high reliability. Specification -Rated Voltage: 12V -Voltage Range: 3-24V -Rated : <=12mA -Sound Output: >=85dB - Frequency: 3000±500Hz -Operating Temperature: -20~+45 degree centigrade -Storage Temperature: -20~+60 degree centigrade Package list: 3 Piezo Buzzers