Product Name: USB PhoneModel Number: XT-02Place of Origin: ChinaFeatures: 1) USB 2.0 port 2) 16 bit sound card inside, the PC can be without sound card 3) Supports H.323, SIP, MGCP etc. lot of protocols 4) Supports product serial write in 5) With HID (Human Interface Device) feature 6) Plug and play to install USB driver 7) No driver needed for Win98 SE/Win ME/ Win 2000/Win XP/ Mac OS/Mac OS X 8) With PID (Physical Interface Device) feature 9) Implement Real-Time verification 10) Compatible with major PC\'\'s Internet phone application software 11) Provides ringer generation for PC to PC call through existing IP phone applications 12) Optional ITSP application software with credit for PC to phone connection 13) ALED to indicate power and linking status 14) Adjustable volume for handset 15) Supports E.164 dialing rule 16) Record support 17) The powered via the USB port with no need for a power adaptor 18) It can support Skype, MSN, net2phone, etalk, Stanaphone, SJphone, X-Lite, X-PRO, Firefly, eyebeam, Baoshitong etc. software