This is the ULTIMATE in sound card interfaces. It has all the features of the MFJ-1275 PLUS..

Direct Keying Jack: Allows direct keying of your radio in CW or FSK operation.

Auxilary Input Jack: Lets you connect an external device such as a tape player or audio from your camcorder or VCR through the MFJ-1279MX, so you have both peripherals in line.

When the MFJ-1279MX is OFF, the external device is connected to the computer sound card. No more plugging and unplugging cables.

Headphone Jack: Use your stereo headphones. External speaker is turned off when headphones are connected.

Footswitch: A footswitch can be used for PTT when VOX is not used. We recommend the MFJ-1709.

The MFJ-1279 includes CD, RS-232 cable, AC Adaptor, and audio cables. It has an 8-pin modular mic port. Uses 220 VAC.