Sony's ECM-44 is an affordable, general voice model that provides good sound quality and is widely used in business presentation systems and TV production. 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.
Convenient to use
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.
Professional image
Either 'in front of camera' or at a business presentation the ECM-44 creates a professional and tidy image.
Easy to use
It can often be difficult to achieve good quality voice pick-up but the ECM-44 can help get good results. The microphone's capsule is designed for general voice pick-up with a mid-frequency emphasis characteristic and a suitable frequency response.
- Capsule type: Electret Condenser 
 - Frequency response: 40(15,000Hz
 - Directivity: OMNI
 - Microphone cable: 3m
 - Output connector: XLR-3-12C TYPE
 - Battery: SUM-3(NS)(1.5V)
 - Ext. power: ---
 - Dynamic range: equal to or greater than (90dB)
 - Signal-to-noise ratio
(A weighted, 1kHz, 1 Pa.): equal to or greater than (62dB)
 - Inherent noise
(0dB SPL =20(Pa.): equal to or less than(32dB SPL)
 - Wind noise
(w/wind screen): equal to or less than(40dB SPL)
 - Maximum input 
sound pressure level: 122dB SPL
 - POWER SUPPLY: 
 - Battery life: Approx. 5,000H 
 - Sensitivity
(0dB=1V/Pa,at 1kHz): -53.0dB(3dB) 
 - Output impedance
at 1kHz: 250ohms +/-20% (Balanced)  
 
ECM-44 User Manual