GKC Part #441 Model #305 Communications Amplifier with 25 Number Memory Dialer Radius This headset can be used

This headset can be used for the Models #300

If the tubing wears out or the clip breaks on a custom molded audioclarifier product

Cord has a 3 pin XLR male plug on one end and an RJ 11 telephone plug on the other end

On-Camera Audioclarifier with custom ear mold

GKC Part #441 Model #305 Communications Amplifier with 25 Number Memory Dialer Radius This headset can be usedThis advanced communications amplifier is most versatile for both IFB and ENG field operations. It operates similar to the Model 300 but with more features. It can be used on a standard telephone line, a satellite phone or IFB feeds, from a remote truck. The unit is used with a low impedance headset or a lapel mic and earphone. Features include two independent output channels, one for the headset output, the other for the IFB output with 1 4" and 1 8"