This is a high quality optical USB mouse with VoIP phone features. It can transform into a VoIP phone with just a flip of the cover. The fully functional keypad and the LCD screen enable you to make/receive VoIP calls even easier. Just plug it into your PC or laptop, and then you can enjoy the full features of Skype and many other popular VoIP applications such as VoipButser, VoipStunt, VoIPCheap, WebCallDirect, VoipCheapCom, and FreeCall, etc. Key Features: Auto detection between mouse and VoIP phone Seamlessly integrated with Skype, VoipButser, VoipStunt, VoIPCheap, VoipDiscount, SparVoip, Internetcalls, poivY, WebCallDirect, VoipCheapCom, FreeCall and NetAppel. Monochrome 128*64 pixel LCD with backlight. Supports all kinds of languages VoIP Contact List, Call List, Call history, time, and caller ID display on LCD screen 800 DPI optical sensor Built-in speaker and earphone connector allows for hands-free function Various chord music ring tones catering to different tastes. Fully functional keypad and LCD screen enables you to make/receive calls without using Keyboard and mouse. Rings loudly on an incoming call. Acoustically isolated earpiece and microphone to eliminate echo. Full-duplex communication with crystal clear sound. USB interface PnP. No external power/sound card needed.