It looked like a pre-amp, perhaps a compressor from the late 1980s. It had large, satisfying knobs that clicked into place and VU meters with needles that twitched at the slightest vibration. But it had no power cable, only a hardwired, industrial-grade umbilical cord that ended in a three-prong plug he didn't recognize.
: You can customize the LCD backlight and sleep timer to maximize your battery life. Bluetooth Pairing