Which BEST BUY " This cordless phone is one of the best we’ve ever tested & is a clear Best Buy. It’s packed with features, has a fantastic answering machine & is easy to use." This is the Quad unit of the Siemens Gigaset SL565, please see the single or twin unit below for details.LONG RANGE VERSION AVAILABLE The Siemens Gigaset SL565 Quad is available with double the normal range. If you live in a big house or one in which you suffer from poor range, please click here. AVAILABLE WITH WIRELESS HEADSET Bundle packs which include a wireless headset for complete freedom. Please click here. ADDITIONAL HANDSET FOR THIS PHONE The correct additional handset for this phone is available here.