Material Brilliant Sound Quality Built with materials for beauty and wear resistance, delivering a long service life. Offers fidelity sound with pure, transparent treble, smooth midrange, and strong bass, restoring details for an immersive listening experience. Multiple Audio Input Ways Supports Bluetooth 5.1 for wireless playback from mobile phones, tablets, and other devices. Includes a 3.5 mm AUX input for connection to TV, computer, and other equipment, enabling flexible setups. Knob Control Colorful Light Features a multifunctional knob for precise sound adjustment; 10 levels of volume indication provide intuitive control. Includes colorful lighting with 4 levels of brightness and 2 rhythmic modes to enhance the music experience. Mobilephone Sinilink APP Control In addition to manual operation, the amplifier can be controlled remotely via the Sinilink APP. Functions include Bluetooth name modification, connection password setting, beep switch, sound effect adjustment, and U disk playlist view for convenient operation. Practical use scenarios Living room television and music setup: connect to a TV via AUX for clear dialogue and to a phone via Bluetooth for music, then use the knob to finetune the sound and enjoy the ambient lighting for atmosphere. Desktop or portable listening: pair with a smartphone or tablet over Bluetooth for wireless music, or use the AUX input with a computer, while using the Sinilink app to adjust sound effects and browse USB playlists. USB/playlist oriented playback: insert a USB disk and view playlists through the app, adjust sound with the knob, and switch lighting modes to suit a party or a relaxed listening session.