Model No. SF-TH28-K1

1. Large waterproof PTT (IP54) owns good texture.
2. Flexible & fully adjustable band for comfortable wearing.
3. Durable and thick cable, designed for tough environment.
4. Transparent flexible acoustic sound tube will protect you from radiation.
5. Soft plastic earbud fits snugly to ear, which keeps your conversation private.
6. Clear sound expression speaker and sensitive vibration detecting microphone.
7. Since the microphone transmits directly from your throat, it is not sensitive to the background noise. This is exceptionally ideal for usage in high ambient environment such as driving, riding motorcycles and bicycles.
8. With the best-quality transparent acoustic tube that could hardly be detected by people around you, this is also ideal for surveillance purposes and security at airports, casinos, crowd control at conventions and concerts, and other working environment requiring discreet communications. The throat mic could be easily hidden under the collars too.
9. Two-pin standard diameter: Ear 3.5mm stereo (top pin). Mic 2.5mm stereo (bottom pin).
10. Space of two-pin: 11mm
11. Available for Icom,standard,Yaesu,Kenwood,Motorola,Viser transceivers and other brands.
    

Speaker:
Speaker size:12mm
Sound pressure level:84dB±3dB
Impedance:20  Ω±15%

Microphone:
Type: Electret microphone
Microphone size: 9.7*5mm
Frequency response: 20-16000 HZ
Sensitivity: -40dB± 2dB
Impedance: 2.2K  Ω