Features • Optima HD voice, full duplex technology • 10-feet (3-meters) 120°H voice pickup • Capacitive mute touchpad with bicolor LED • Echo cancellation • For use with Yealink CP860 Specification Microphonefeatures •Optima HD voice • full duplex technology • Muting the microphones with touchpad • Bi-color LED • 10-feet (3-meters) 120°H voice pickup Physical features • Connection cable length: 1.8 meters • 1xRJ9(4P4C) port for connecting to CP860 •Dimension(W*D*H): 104mm*117mm*22mm • Operating humidity: 10~95% • Storage temperature: -10~50°C