The dynamic boom microphone used on the W1 headset is available as a D-I-Y kit to be added to your favorite headphones, or to fix a broken headset from other manufacturers. 600 ohm dynamic element with excellent transmit audio and the correct impedance for your HF transceiver microphone input. Includes long straight cable terminated in 1/8" mono output connector, to use with INRAD series M mic jack adapters. Available in August. Instruction manual will be posted to our website after shipments of the W1 headset begin.