The "Harris Lm1" is an omnidirectional unibody lavalier microphone. 

It has almost the size of a Sony ECM-V1BMP.. it has a slightly higher output and more bottom.
it can be perfectly used as a replacement for a Sony wireless connection like UTX-B03
(does NOT work on a Sennheiser wireless system)

Overall..it has a prestine performance
I would say it does not need to shy away from the comparison with a Sennheiser ME4-N, MKE2, DPA 6060 or Sanken COS-11D

Try it ... you will be surprised!
  • Omnidirectional electret condenser lavalier microphone
  • Produces a sharp, clean sound with high speech intelligibility
  • Easy to attach to clothing
  • Discrete design is virtually invisible
  • Directional Characteristic: Non-Directional

    • Sensitivity:－32 dB ±3 dB at 1 kHz (0 dB＝1 V/Pa) R ＝2 kΩ V ＝3V
    • Impedance: (1.6 kΩ ± 30％ at 1 kHz (R ＝2 kΩ )
    • Frequency Response: 50- 20,000 KHz
    • S / N Ratio = 74 dB at 1 kHz (1 Pa, A weighted network)
    • Max Input Sound Level: 122 dB Typ. S.P.L.
    • Operating Voltage  ( 1.5 V ～ 10 V )
    • Circuit Current:  500 μA max ( V ＝3 V )
the receiver shown in the picture "Sony UTX-B03" is NOT part of the deal, it is the lavalier mic. only!!