Short-press to cycle through available audio sources: Bluetooth ➔ FM Radio ➔ USB ➔ Micro SD ➔ AUX In .
If your BTS726 (assuming a typo for BTS766) or BTS766 speaker is acting up, here is the manual's troubleshooting section, expanded. bts766 speaker manual best
The first oddity happened at 3:17 AM. Ethan woke to a faint, staticky whisper coming from the kitchen. He crept in, heart hammering, to find the BTS766 glowing a soft amber. The voice was low, almost subsonic, repeating a single phrase: “Manual… page four… diagram B.” He unplugged it, and the voice stopped. He chalked it up to a glitch. Ethan woke to a faint, staticky whisper coming
A month later, he got an email from the BTS766 support team. Subject line: “Your RockBox Pro Manual Feedback?” The body was blank except for a link. He clicked it. It led to a PDF titled bts766_speaker_manual_best_v2.pdf . The first page had a single sentence in bold red: He chalked it up to a glitch