Sony Walkman Nw-s644 8gb Digital Mp3 Audio Player

The Sony Walkman NW-S644 is a classic S-series music player released in 2009. It features exceptional battery life and a slim, lightweight design. Below is a summary of its core features:

1. Core Specifications and Design

Storage Capacity: Built-in 8GB flash memory.

Screen Display: 2.0-inch QVGA (240x320) high-definition color LCD screen.

Extreme Battery Life: Up to approximately 42 hours of music playback (MP3 128kbps) and approximately 10 hours of video playback.

Battery Protection: Features a "Battery Maintenance" function that extends battery life by limiting charging to 90%.

2. Main Functional Features

Music Playback: Supports MP3, WMA, AAC, and linear PCM (WAV) formats.

Lyrics Pita: Supports automatic scrolling lyrics display along with the music.

SensMe Channels: Automatically categorizes songs based on their tone, allowing you to select channels according to your mood (e.g., "upbeat," "healing").

Sound Enhancement: Features DSEE (High-Frequency Compensation), Clear Stereo, and Clear Bass technologies.

FM Radio: Built-in FM tuner.

Direct Encoding: Record music directly from CDs or other audio sources using a dedicated cable without a computer.

3. Operation Tips and Maintenance

File Transfer: Supports drag-and-drop functionality, allowing you to directly drag audio/video files from your computer folders into the Walkman's [Storage Media] directory.

HOLD Switch: If the buttons are unresponsive, check if the HOLD switch on the side of the device is in the "on" position.

Charging Instructions: Charge via a computer using the dedicated USB cable. A full charge takes approximately 3 hours.

Connection recognition: If the computer cannot recognize the device and the screen is not lit, please charge the battery for about 10 minutes to wake it up.