Specifications: 1) Free from PC 2) With ringer,16-BIT Hight Quality Sound 3) PC-to-PC and PC-to-phone operation 4) Driver built-in, plug and play 5) USB 1.1 compatible 6) No need sound card 7) No external power required 8) Echo cancellation, noise reduction 9) Application support: Skype, MSN, Yahoo and more, support Skype speed-dialing function 10) Full duplex communication 11) Key-in tone function Packing Details: - Color box size: 14.5*9*3.5 cm - Qty/Ctn: 90 pcs - G.W.: 7.5 kgs - N.W.: 6.5 kgs - Meas.: 30.5*54*29 cm