Needle Microphone with Amplifier

PKI 2455Print

In some cases it is only possible to listen into a room through very small openings that can be used for the insertion of room-monitoring microphones in order to capture the spoken words. For this purpose our PKI 2455 is the right choice to solve such problems. The complete unit comes with a highly sensitive and tiny little rigid microphone plus a pocket-sized amplifier. The electronic unit amplifies the incoming signals and offers a direct listening via headphones (included) or recording on any kind of recorder, whether analogue or digital. VOX-operation i.e. sound-level control of incoming signals is provided for an extensive use of the recorder for a fully automatic operation.


  • Microphone: highly sensitive electret microphone placed in rigid tube of 2,5mm diameter and 300 mm length
  • Acoustical distance: up to 10 m
  • Operation time: up to 60 hours
  • Microphone connection 2,5 mm jack
  • Power supply: 9 VDC standard block battery from amplifier also powering the microphone
  • Total weight: approx. 200 g
  • Dimensions of amplifier: approx. 95 x 60 x 25 mm
  • Accessories Headphones included
  • Recommended recorder PKI 2450