Addcom ADDQD-14 Geni Cord removes the need to have multiple cords for the different types of phone systems in use today. ADDCOM now has one cord that will work with 98% of telephone systems. It is also feature packed with a simple 2 position compatibility switch, a 3 position mic gain switch, an easy to use "receiving volume" scroll wheel and a "push to mute" button.
FEATURES :
-Simplified 2 position polarity switch, automatically detecting positive or negative polarity
-3 position microphone volume control switch.
-Easy to use receive volume scroll wheel
-Conveniently positioned "push to mute" button
-Ergonomically designed to fit comfortably in your hand.