Plantronics 83545-02 Savi W710 Mono DECT Wi-Fi Head Set
http://www.amazon.co.uk/gp/product/B005PLG83C?tag=istiqomah-21
Three-way connectivity lets you easily switch and mix audio between PC mobile and desk phone calls
Automatically routes mobile audio to whichever device you pick up - headset or mobile phone
Easily transfer audio between headset and mobile phone to take calls on-the-road
UC presence automatically updated when on a PC mobile or desk phone call
Energy efficient adaptive power system optimises for range and talk time
