Sony Lavalier Electret Condenser microphone,

The ECM-44 is available in four versions, featuring different connector types. This model, ECM-44B, is the XLR version with power barrel for use as a wired microphone.

The ECM-44 is an affordable alternative to the traditional hand held microphone and being 'hands free' it allows the presenter to concentrate on her/his performance The microphone's capsule is designed for general voice pick-up with a mid-frequency emphasis characteristic and a suitable frequency response. The ECM-44's capsule features an emphasis curve and a suitable frequency response for voice pick-up.

The capsule has a diameter of only 8.5mm and is 14.5mm long. The ECM-44B is the wired version with an XLR output and integral power supply barrel. This version is to be powered internally by battery (LR6 or AA size). A single AA battery will provide several thousand hours of use.