Music OntheGo: Lightweight MP3 Player

 This is how you could summarize the specifications into a descriptive English paragraph, with Chinese translation:

"Our model D601 is a brand new MP3 player featuring a compact design and no display screen. It supports TF cards for storage expansion and operates via buttons. With a USB 2.0 interface, it allows for convenient data transfer. This player supports WMA audio format and is equipped with a lithium battery, providing up to 5 hours of playback time. It comes in black color and includes accessories."

Steps to Play Music: Switch the MP3 player to ON position, and the red light will start flashing indicating the beginning of music playback. During this process, you can adjust the volume using the /- keys and select songs using the > keys. After use, please switch the player to the OFF position.

Usage Precautions:

1. Do not exceed 2 hours when charging the MP3 player with a charger, as this may result in the failure or damage of the built-in lithium battery.
2. During charging, do not solely rely on the status of the MP3 player or charger indicator lights to determine charging status (even if the indicator light is not on, it may still be charging). Typically, it takes about 1.5 hours to fully charge, and after full charge, there will be no change in the status of the MP3 player or charger indicator lights.