High-performance decoding chip ES903902M for superior audio quality. Dual SGM8262 operational amplifiers designed to achieve a lower noise floor. Supports 8-band filter adjustment for customizable sound preferences. UAC2.0 HIF mode and UAC1.0 game mode for versatile connectivity options. Easy mode switching with simple button combinations for user convenience. Audio decoding bridge chip CT7601PR, high-performance decoding chip ES903902M, dual SGM8262 operational amplifiers for lower noise floor. 1. Supports 8-band filter adjustment: Double-click volume +/-; High/low gain: Long pause/play. 2. Supports: UAC2.0 HIF mode and UAC1.0 game mode. 3. UAC1.0 mode: and hold the pause/play button while plugging in the device and powering on. 4. UAC2.0 mode: Directly plug in the device and power on. 5. Filter mode: Long and hold volume +/volume - simultaneously; mode 1-7 lights flash once; mode 8 lights flash twice. Color: Black Material: Metal+Plastic Package Contents: 1*Audio Decoder 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.