Sony D-T4 that works and plays CD when plugged in with standard 9V adapter. Rechargeable battery is included but it is unknown if the battery will hold a charge or works. The first CD used to test played smoothly up through the 5th track and began to skip, but this might be an issue with the CD and not the player as other tracks played smoothly. Tested with another CD and there was no issue with skipping.

The headphone output does not function very well, I tested with multiple headphones and the sound was spotty and only played in the left headphone. The line output worked fine and smoothly. Volume could be adjusted via external speaker controls from line out and sound was clear to both speakers.

The FM/AM radio function is spotty and does not always work unless you press on the switch on the side. This may need to be adjusted if this is a function you want to use.

Not an expert on CD players so that was the extent of the testing. If you have additional questions send me a message and I can try to test the item.

Only the battery and CD player are included. NO CHARGER is included, I only used a 9V charger from a guitar pedal to test this item so you will have to purchase your own.