Bluetooth connectivity supports a smartphone as the source and can pair with two Amplifier BOXs simultaneously. Dualchannel stereo output delivers distinct left and right channels for clear, immersive sound. Bluetooth Version 5.3 provides a stable wireless connection with improved range and efficiency. FullDigital System Design with PCM technology delivers audio with no noise for cleaner playback. Use scenarios Home stereo setup: connect your phone via Bluetooth and output to two Amplifier BOXs to create a wide, immersive stereo experience in a living room or open space. Small gatherings or events: stream music from a single source to two Amplifier BOXs placed in different areas to ensure synchronized sound coverage. Studio, classroom, or small venue: use with a Bluetooth source to drive two Amplifier BOXs for clear, noise playback during presentations or performances.