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Description:It can support Skype, MSN, net2phone, etalk, Stanaphone, SJphone, X-Lite, X-PRO, Firefly, eyebeam, Baoshitong etc software. . Function Features * Support Skype; * PnP USB interface, compatible with USB1.1; * 3-row LCD display date/time/number/credit balance etc; * Caller ID display & incoming call ring; * 199 incoming & 199 outgoing call records can be stored, reviewed and dialed out; * With built-in ringer, personalized rings selectable and volume adjustable; * Keypad-dialing with key-in tone; * No need sound card; * No external power required; * Full duplex communication; * With DSP speech processor, Echo cancellation and noise reduction; * Portable design for notebook. . * Comply with USB V1.1. * Comply with USB Audio Device Class Spec V1.0. * Comply with USB HID Version1.1. * Class-A USB linker. * Dimension: 125mm*50mm*26mm. * Weight: 160g. * Operating Voltage: 4V-5.25V DC * Operating Temperature:-10~+40oC m?m . * Relative Humidity:10%~95%. * Ambient noise:&le 60VdB(A). . System requirement * Pentium MMX 300Hz or above, 128M EMS memory or above, with USB port. * Microsoft Windows 98SE/Win ME/2000/XP operating system. * Broadband or 56K modem. . carton : L.W.H: 21*15.5*5 mm 155g/pcs (1pcs) Meas: 45.5*35*34.5cm 6.2 kg ( 40pcs )