Immersion gold PCB board, low impedance, good conductivity, and improved tone. Adopt USB decoder chip upgraded PCM2706C, fully compatible with USB2.0, faster transmission speed, better experience of high-definition quality music. Active crystal oscillator, low noise, high frequency precision, high frequency, high stability. Note: If you don't install the driver, you can only adjust the volume in the player. Some for WIN10 systems may not be to adjust the volume system after installing the driver. Please don't if you mind. Thank you! If you need a driver, please contact customer service before placing an order. Input: computer, mobile phone, OTG, set-top box Output amplitude: 1.5Vrms Analog output: 3.5mm audio jack Sampling rate: 16bit/48kHz Signal-to-noise ratio: 108dB Harmonic distortion: 0.003% Color: Silver Grey Material: Aluminum Alloy Package Contents: 1 x USB External Hifi Sound Card Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.