Product Details
Functions: 1.PnP USB interface, compatible with USB 1.1 2.Clear voice quality 3.Built-in DTMF dialing 4.Incoming call ring, easy for answering 5.No sound card and extra power supply required 6.Compact appearance design suitable for notebook 7.Applicable for wide and compatible multi calling platforms 8.Choosing proper platform to communicate between two USB IP phones, it can realize conversation free of charge on the earth.