CALRAD | iPhone Headset Stereo
3.5MM

Product #: 42-140
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Description

3.5mm Plug, 4 conductor, Use with iPhone 3G & 3GS models Includes mic push button for controlling various features on the iPhone. Microphone: 3mm x 1.5mm -62db, +-3db Impedance: 32 ohms. 3 Ft Long.