Key Specifications/Special Features:

Full-function keypad enables end-users to make/receive calls easier
Rings loudly on an incoming Skype call
Acoustically isolated speaker and microphone to eliminate echo
DTMF dial tone allows you to dial extension number
Full-duplex communication with crystal clear speech
USB interface PnP. No external power/sound card required
LCD time display
Hook switch allows for intuitive answering/ending Skype calls
Dimensions: 240mm x 123mm x 30mm
Weight: 820g
Power LED
USB port: USB B-type connector