1. Ideal for group conference, free internet call and music enjoyment. 2. Due to 48KHz sample rate, presenting CD-quality music and high fidelity sound. 3. HI-FI amplifier and high-quality speaker. 4. Full-duplex conversation, crystal clear voice. 5. DSP built-in for echo cancellation and noise reduction. 6. Adjustable volume and mute control. 7. Convenient for private conversations with ear-phone. 8. Ideal for travel because of small size and light weight. 9. USB 1.0 & 2.0 compatible, No driver required. 10. Mac and PC compatible. 11. Supporting all softphone, like Skype, MSN, Yahoo messenger, AOL, Vonage and VoIPBuster . Hardware: cable, ADSL.) 1 pc/color box,20pcs/ctn GW:7.5KG NW:6.5KG CTN size:380*380*295mm