Features: 1) Comfortable ear hook 2) Mic cover with an iron clip 3) With a PTT/VOX button to control Mic 4) Available models suitable and compatible with various transceivers 5) Speaker diameter: 23mm 6) Frequency response: 20Hz - 20kHz 7) Impedance: 32Ω 8) Sensitivity: 105±5dB 9) Max. input power: 50mW 10) Mic impedance: 2.2KΩ 11) Mic sensitivity: -60±3dB at 1kHz Inner packing: Polybag or customized Outer packing: Carton