Magnetic Buzzer -Buzzer alarm -Application:Mobile,Computer,Medical equipment Buzzer , 12*7.5mm buzzer 1.Company Profile-Dongguan Sweetsound Electronic Company Limited, ... for the past 16 years.2.Main Feature of buzzer:(12*7.5mm,2700Hz,5VDC)-Small size;-High sound pressure;-Not allowed ... ,Active circuit (Internal oscillator buzzer)4.Drawing5.Plant6.Cooperators Buzzer , 12*7.5mm buzzer