Professional High Quality Boom Mic Headset


PHO 421 is an ultra-light and highly comfortable communication headset providing excellent speech intelligibility and clear voice transmission in all situations.

Technical Specifications

  • Microphone sensitivity: -44 (±4) dB re. 1V/Pa at 1 kHz
  • Microphone type: Electret, noise canceling
  • Ear speaker sensitivity: 94 dBA @ 150 mVRMS
  • Ear speaker impedance: 50 Ω DC, 100 Ω @ 1 kHz
  • Cable pull force: 50 N
  • Operational temperature range: -20°C – +60°C
  • Electromagnetic compatibility (EMC) EN 55022, EN 55024


Delivered with generic earphone kit: Right and Left ear units & 3 silicon inserts.
Also available with molded ear shell on demand.

kr. 3.010,00

Prices in Danish Krone (DKK) including VAT


PHO211 2 Very high-quality boom-mic headset
PHO211 3 Long-lasting comfort, no parts covering or hanging off the outer ear
PHO211 4 No pressure around the head or discomfort: total freedom
PHO211 5 Excellent speech intelligibility: crystal-clear sound