1) 800 dpi optical sentor
2) Crystal clear sound quality
3) 48 KHz sampling rate
4) Supplied earphone to protect your privacy.
5) Auto detection between mouse and VoIP phone
6) Seamlessly integrated with Skype,VoipButser,VoipStunt,VoIPCheap,VoipDiscount,SparVoip, Internetcalls,poivY,WebCallDirect,VoipCheapCom,FreeCall and NetAppel.
7) Monochrome 128*64 pixel LCD with backlight. Supports all kinds of languages
8) VoIP Contact List, Call List, Call history,time,and caller ID display on LCD screen