... , driver wirless usb phone,ideal for a present,good for business man on trip,support PC-PC,PC-Phone ... phonebook free and auto run on PC without install any driver!Support most of voip protocal ,etc ... ,easy operation* Support the calling between PC-to-PC and PC-to-Phone* Echo cancellation,noise reduction ... display,No external power and sound card required;* Comfortable operation panel,similar as mobile phone ...