This Kyocera Hands-Free Headset allows freedom of movement and use of both hands during a call. This headset has a standard 2.5mm jack that plugs directly into your cellular phone. No adapter is necessary. A mute button is located near the microphone for privacy. Fits the QCP™ 2035, QCP™ 2035a, QCP™ 2027, QCP™ 3035, QCP™ 6035, Kyocera 1135, Kyocera 2119, Kyocera 2119b, Kyocera 2135, Kyocera 2235, Kyocera 2255 phones.