Signal-Pro-SO XP3 Split Wire Earpiece for Sonim Phones


KLN Signal-Pro-SO
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Product Description

Signal Pro Split Wire Surveillance Earpiece for Sonim XP3 Phones


Built for the Sonim phone series. Functions include Push-To-Talk (PTT) with crystal clear audio



The SIGNAL PRO Wired PTT Headset includes a replaceable audio tube and earpiece for comfortable, all day use. The SIGNAL PRO’s 2-Wire design allows for the headset cords to be clipped over or under clothes or a uniform, while on the job.


Klein custom designed the SIGNAL PRO headset to reliably connect to Sonim’s Secure Audio Connector on the XP3plus and XP3 handsets. This allows the SIGNAL PRO headset connector to twist into place into the handset. The SIGNAL PRO headset has a large, easy to access PTT button, compatible with heavy work gloves.



  • Push-to-Talk and full-duplex wired headset
  • Professional 2-Wire surveillance earpiece with audio tube for comfortable, all day use
  • Noise reduction microphone
  • Thumb PTT & microphone in single housing
  • Clear quick-disconnect audio acoustic coil tube
  • Built-in clip to easily attach headset cable to uniform
  • Omni-directional Microphone
  • Microphone Sensitivity -36dB±3dB
  • Microphone Impedance Max.2.2K Ω 1kHz (RL-2.2K Ω)
  • Microphone Signal / Noise Ratio +58dB @ 1kHz (0dB=1V/Pa)
  • Microphone Current Consumption Max: 0.5μA RL=2.2KΩ Vcc=3.0V
  • Microphone Max Sound Pressure Level 110dB S.P.L
  • Speaker Sensitivity 108 @ 1kHz (dB SPL)
  • Speaker Impedance 200 @ 500 Hz (Ohms)
  • Speaker DC Resistance Impedance 92 (Ohms)
  • Compatible with Sonim XP3plus and XP3 handsets
  • Designed and Assembled in the USA
  • 3 Year Limited Liability Warranty
  • Operating Temperature -40°C – +80°C
  • Klein SIGNAL PRO Length 78 inches, Weight 41g
  • Top Cable Length from Splitter 30 inches
  • Bottom Cable Coiled Length 28 inches
  • Packaged Product Dimensions 5 x 6 x 1.5 inches, Weight 85g

Works on Sonim XP3 Phone Series (except Sonim IS intrinsically safe phones)