Details : Place of Origin: China (Mainland) Type: Buzzer Resonant Frequency: 3.2±0.4 KHz Resonant impedance: ≤400 Ω Capacitance at 1KHz: 35000±30% pF Metal plate diameter: 27.0±0.2 mm Ceramic plate diameter: 20.0±0.5 mm Sound Output: 85db at 30Cm PPM : ≤1000 Application : Piezo switch , IC card Metal material: Brass RoHS: Yes Color: As shown diameter 27mm dan 35mm silakan pilih varian aktif