... 2, Have room to negociate about price;3, Make formula by ourselves;4, Carry out all of our production processes.Magnetic Buzzer/ magnetic transducer ... equipment, Alarm system.Main feature of magnetic buzzer/ magnetic transducer:-Small size;-High sound pressure;-Not ... .The main Attribute characters for Magnetic buzzer/ magnetic transducer, as followsMaterial: Magnetic; ABS;PPOConnection terminal: Pin, ...