Shure VR250D Electret Cardioid Headworn Headset for Voice Recognition.

Electret Cardioid Headworn Microphone

VR250B Headworn Microphone for computer speech input applications. Same high quality electret element used in microphones bundled with many voice recognition software packages. Stylish, lightweight over the ears design for maximum wearer comfort. Easily adjustable for size.

Specifications

Type: Electret, Close-Talking

Frequency Response (at 8mm [5/16 inch]): 50 to 15,000 Hz

Polar Pattern: Cardioid (Unidirectional) response-iniform with frequency, symmetrical about axis

Impedance: Microphone rating impedance is 150 ohms (200 ohms actual)

Output Level (close-talked at 1,000 Hz): Open Circuit Voltage / -16.5 db (150mV) (0 dB= 1V/100 ubar); Power Level / -66.0 db (0 dB= 1mW/10 ubar)

Hum Sensitivity: 38.4 dB equivalent SPL in a 1 millioersted field

Environmental Conditions: Operating Temperatures: -18 to 60C (0 to 140F); Storage Temperatures: -40 to 74C (-40 to 165F); Humidity: 0 to 95%

Cable: Attached 3.0m (10ft), small-diameter, shielded, PVC-jacketed

Construction: Black thermoplastic housing; stainless steel grille; black-TEFLON‚-coated steel wireframe; rubber-clad steel gooseneck; rubber/nylon elastic headband

Net Weight (including connector): 60.1 g (2.12 oz)

The next generation of the original Shure microphone used by OEM software developers to create the voice models used in their systems. Optimized frequency response, unidirectional pickup pattern and low distortion for high accuracy speech to text or voice ID requirements.

Shure ruggedness and reliability is an advantage for use in any home or office environment. High impact plastic housing and a thin flexible boom arm locates the microphone in the ideal location near the speaker's mouth. Comes with an attached 10 foot small diameter cable and 3.5mm plug. Includes snap on clothing clip, 2 replaceable foam pop screens. Two year warranty.