1. Multifunctional high-fidelity stereo audio decoder board with Bluetooth audio decoding, TF card, USB drive music file decoding, computer USB sound card, and LINE input support. 2. 2.8-inch 320x240 pixels IPS color screen displays playback status and decoding information. Supports both analog audio and digital audio (I2S) output. 3. 3.5mm stereo line-in connector for audio input from phones, computers, MP3 players, and other devices. 4. Supports SBC/AAC audio transmission protocol in Bluetooth mode. Displays Bluetooth song title, lyrics, and ID3 information. Supports spectrum display. 5. Built-in equalizer with 7 preset EQ modes and 1 customizable EQ mode for personalized sound adjustment. Supports Chinese and English display Operating voltage: 4.5–5.0V (regulated power supply required) Standby current: 20mA Operating current: 30–180mA Audio output signal power: ≤50mW Audio output signal-to-noise ratio: ≥104dB Output audio signal level: ≤2.8Vp-p Number of audio output channels: 2 Audio hardware bit width: 24-bit Bluetooth receiving distance: up to 10 meters Bluetooth version: V5.3 Screen specification: 2.8-inch 320x240 pixels IPS screen Color: Black Material: Plastic + Metal Package Contents: 1 x Decoder board module 1 x Hexagonal wrench 4 sets x Screws and nuts 1 x Remote control 4 x Cables Note: The package includes only the items listed above. Other items are not included. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement error allowed: ±1–3 cm.