Covert Acoustic Air Tube Earpiece Agent Headset for walkie talkie single earpiece /3.5mm jack earphone for two way radio

1.Easy to carry and simple to use. 

2.With coiled PU cable for retractable use. 

3.Unitary functions:can be used separately or together  with PTT microphone speaker. 

4.Speaker size:13mm. 

5.Impedance:32ohm. 

6.Frequency response:20-20KHz 
7.Sensitivity:84dB.

Speaker: 

Speaker size:16mm 

Frequency response: 200-5000 Hz 

Sound pressure level:90dB±3dB 

Impedance:90 Ω ±10% 
Audio output:100mW