Sample Rate: 44.1 / 48 KHz External Box: Yes Line In: Yes Line Out: Front, Surround, Centre/bass, Back MIC In: Yes Features: Analog and digital audio output for seven channels (7.1) of sound Easy to install with plug and play support in Windows XP and Windows Vista. Easy volume control with volume and mute buttons on device. Dimensions: 3.94" x 2.36" x 0.98" Weight: 3.53 oz. [100 g]