Kyocera EarBud Headset Hands Free With On and Off Button 2.5 mm Earbud allows freedom of movement and use of both hands during a call. Kyocera headset with earpiece connected to wire with ear bud that fits directly into ear. Kyocera Hands-free,has a standard 2.5mm jack that plugs directly into your Kyocera cellular phone No adapter is necessary for Kyocera cell phones or other phones that use a 2.5mm hands free jack. Kyocera EarBud Headset Hands Free With On and Off Button 2.5 mm Earbud allows freedom of movement and use of both hands during a call. Kyocera headset with earpiece connected to wire with ear bud that fits directly into ear. Kyocera Hands-free,has a standard 2.5mm jack that plugs directly into your Kyocera cellular phone No adapter is necessary for Kyocera cell phones or other phones that use a 2.5mm hands free jack.