HYS Surveillance Kit Earpiece Clip Microphone PTT with One Pair Medium Earmolds (Two-Wire: 3.8ft/4.3ft) for BPR40 RMM2050 RDV2020 RDU4100 Radio Acoustic Tube Headset auspowers_batchfour Jumper settings are: 1Hz ~

Jumper settings are: 1Hz ~ 50Hz50Hz ~ 1kHz1KHz ~ 10kHz10kHz ~ 200kHz The output duty cycle can fine-tuned using the onboard potentiometers

Read more Advanced & clear MIC Headphones with microphone and remote volume control for hands free calling and convenience to control

5mm Fat pins would show you what a sturdy connection feels like

✔ Easy to install on wooden board

HYS Surveillance Kit Earpiece Clip Microphone PTT with One Pair Medium Earmolds (Two-Wire: 3.8ft/4.3ft) for BPR40 RMM2050 RDV2020 RDU4100 Radio Acoustic Tube Headset auspowers_batchfour Jumper settings are: 1Hz ~HYS Surveillance Kit Earpiece Clip Microphone PTT with One Pair Medium Earmolds (Two Wire: 3. 8ft 4. 3ft) for BPR40 RMM2050 RDV2020 RDU4100 Radio Acoustic Tube Headset Two wires PU cable (kevlar reinforced wires), two polyurethane jacketed. PU Cable Good quality cables tend to be soft, flexible and resistant to snagging. The polyurethane jacketed, Kevlar coated cabling provides extended field life. These are popular for security applications