Product Name: Network PhonesModel Number: PU 1806Place of Origin: ChinaFeatures: 1) Monochrome 128 x 64 pixels LCD, supports all kinds of languages 2) Skype contact list, call list and time display on LCD screen 3) 12 classical 4-polyphonic ring tones 4) Rings loudly on an incoming call 5) Full-function keypad and LCD of Skype contacts enables to make receive calls without using mouse or keyboard 6) Acoustically isolated earpiece and microphone to eliminate echo 7) Supplied earphone for hands-free operation 8) Microphone mute button for privacy protection 9) Full-duplex communication with crystal clear sound 10) USB interface PnP, no external power / sound card needed 11) Handy, chic, and portable for notebooks 12) Also compatible with other PC-based applications: MSN, Yahoo Messager, QQ, Xten, Dialpad, MediaRing, and Net2phone 13) Dimensions: 48 x 120 x 24mm 14) Weight: 90g 15) LED: power LED and status LED 16) Cabling: USB A-type and B-type connectors 17) Standards supported: compliant with USB V1.1 / USB audio device class V1.0 / USB HID version 1.1 18) Earphone connector: 2.5mm 19) Operating humidity: 5 - 95% 20) Operating temperature: 0 - 40°C