Shintaro Hands Free Phone Mono Headset (SH-132) The Shintaro Mono phone headset is the perfect companion for handfree calling in the home or office. The soft padded earcup adjustable headband and 360 degree adjustable microphone ensures comfort when making phone calls. With in-line volume control and two meter long cable you can move freely whilst on the phone. Designed for phones with a 2.5 mm jack.