D5 decoder uses ES9018K2M decoder The chip has a dynamic range of 127dB and produces sound Very full and transparent, so everyone loves it very much D5 adopts JRC5532DD dual operational amplifier. D5 adopts Qualcomm QCC3034 Bluetooth module and supports APTX-HD.APTX-HD transmission protocol high fidelity, high efficiency, and high stability. Featuring transparent windows, stylish andirresistible. Non destructive volume adjustment - Adopting multi-level volume adjustment, Can solve the distortion of left and right channels, Crosstalk and noise interference, Greatly improved 3D The feeling and fidelity of music. DAC D5 Input signal - BT PC OPT COA BT: Connect your phone's Bluetooth signal PC: Connect the computer using a USB cable OPT: Use fiber optic cables to connect CD/DVD/TV COA: Use fiber optic cables to connect CD/DVD/TV Colour:White Material:Metal Package Contents: 1 * Digital DAC Audio Decoder 1 * Remote Control 1 * Type C Cable 1 * English instruction manual 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.