Supports MP3, WMA, WAV, and FLAC files via USB flash drive or TF card. Amazon.com Basic Operation Guide Powering Up: The unit is powered via a USB Type-C port (5V/1A)

: Each channel has dedicated High, Mid, and Bass adjustment knobs for precise tone control. Basic Operation Guide Powering On

He wiped the sweat from his forehead, walked over to the box, and pulled out the device. It was surprisingly light—under four pounds—with a sleek, ergonomic handle that felt natural in his grip.