Model: PL-802 Features: Compatible with SKYPE software(eg:PChome-skype). Digital volume adjustment DTMF key-in tone function Supports telephone mute function with blinking function Plug an play to install USB driver The powered via the USB port with not need for a power adaptor Browse PChome-SKYPE contacts and communication data Adjustable volume for handset When dial/receive call, computer-controlled tone function Dimension: 15(L)*3.8(W)*1.8(H)cm Weight: 55g Workable circumstance: Temperature:5℃-40℃ Humidity:20%-80% System requirements: Microsoft Windows 2000/xp Pentium 400MHZ above processor/128 MB RAM 15MB free hard disk capacity Internet connection(ADSL, Cable modem)