Cambridge Audio DacMagic XS V2 DAC Headphone Amplifier - Gold Instant upgrade to any computers sound output Connects quickly and easily to any USB port and allows you to hear your favourite music and movies with every drop of detail, exactly as the artist intended Delivers up to 10 times more power than most laptop soundcards Volume is easily adjusted on the simple fingertip controls LED shows the sample rate, so you always know youre getting the right level of clarity and detail from your tracks Signal To Noise Ratio : 103 dBr (unweighted) Crosstalk @ 1KHZ: 66dB Output Impedance : 0.5 Ohms Volume Steps : 53 steps (54 different volume levels) Dimensions (WXHXD): 1.2 x 0.4 x 2.1 (30 x 10 x 53.5mm) Weight : 3.5oz (100g) Connections: Micro USB input, 3.5mm analogue output Digital To Analogue Converter : ESS9023 24-bit DAC Sample Rates Supported : USB 1.0 mode: 16/24-bit, 44.1kHz, 48kHz, 88.2kHz, 96kHz USB 2.0 mode: 16/24-bit, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz Output Voltage : 2V RMS Max. Power Consumption : 150mW Min. Headphone Impedance : 12 Ohms Frequency Response:  +/-0.2dB 20Hz  20kHz