We have been offered 2 Savi 400 headsets, to help you bring state of the art wireless phone technology to your home or workplace.

Wireless freedom that won't weigh you down. For PC-based office and remote workers, the Savi® 400 Series offers excellent audio quality, up to 300 feet of wireless range and your choice of four wearing styles including the Savi 440 – the lightest DECT headset on the market that features a hot swappable battery for unlimited talk time and can be worn three ways to match your personal style.

Get more done, with a headset that goes where you go.  Excellent audio quality follows you everywhere you want it. You will also appreciate the simple call management functions, including one-touc answer, volume and mute options.  Wear the phone any of its convertible ways: over-the-ear, behind-the-head, over-the-head.

See the item online with full tech specs and additional info:
http://www.plantronics.com/us/product/savi-400