The DX220 Max operates on Android 8.1. It can be used as a standalone digital analogue converter (DAC). There are 2 types of equalizer- graphic and parametric. For the graphic equalizer, there are 10 sections of EQ with 5 presets (Classic, Pop, Dance, Rock & ACG). For the parametric equalizer, there are 6 settings. Lastly, it supports line out, SPDIF, Bluetooth 5.0 bi-directional transmission, 2.4G/5G dual band Wi-Fi, QC3.0, PD2.0, MTK PE Plus and MQA. More detailed information can be found under the Specifications section.