Magnetic Buzzer,5Vp-p/50mA(max),Dia. 12mm, Min.Sound Pressure Level 85dB at 2048Hz/5Vp-p Square Wave/10cm,Coil Resistance 45Ω±15%

Magnetic Transducer, Rated Voltage 5V0-p, Resonant Frequency 2400±500 Hz, Minimum SPL 85dBA, Current Draw at Rated Voltage 40mA

Condenser Microphone, Sensitivity -42dB to -38dB Output Impedance 1.5kΩ, SNR 58dB,Decreasing Voltage -3dB, Frequency Response 50Hz to 16kHz

Dynamic Receiver 150Ω,Plate Type Size 35 x 17.2mm, 99dB ±2dB 300Hz - 4KHz