A:AnswerThe "Line in" is an INPUT that allows signal/audio from other sources to be played on this boombox. There is not a OUTPUT or headphone jack on this device.
A:AnswerDear customer, this model does play CDs, (including CD-R/RW). If your disc is playign but you can't hear anything, check to make sure you have disconnected the 3.5mm line input. If you still have issues playing your CD feel free to call or email us and we'll help you find a solution 1-888-999-4215 or [email protected].
A:AnswerThe Boombox will automatically use battery power when batteries are installed. Disconnect the AC power cord from the outlet, install 6 "C" batteries and power on the radio.