Sony NW-S644 Network Walkman 8GB

Sony NW-S644 Network WALKMAN (8GB) JP. Orange. Quantity 1. Used.
* No other items, cables, or accessories are included in the sale *
** This device is powered by a built-in lithium-ion battery, which can be charged by using a WMC-NW20MU USB cable (not included in the sale)  **
*** The menu display language can only be set to Japanese. While most headings have icons that are logical to follow, most text is in Japanese. ***
**** We offer a free user guide to help with device operation ****

Summary: 
Sold for Parts Only / Not Working.
This is a DAMAGED device and may lose some or all of the functionality it had at the time of testing.
The Volume Up/Down buttons do not respond. All other functionality tested is OK.
Very good cosmetic condition. Good battery health.
The device has not been reset and still contains the original sample photos and wallpapers (these folders get wiped if you reset the device).

Product Condition (Appearance):
Display Panel : A few very faint marks.
Front Face : No callouts.
Sides : No callouts.
Rear Face : No callouts.

Product Condition (Functionality):
The Volume Up/Down buttons do not respond. All other functionality tested is OK. The volume is set to 10/30 by using the factory setting reset option.

Charging Via WMC-NW20MU USB Cable : OK  * WMC-NW20MU USB cable is not included in the sale *
Power Via Built-in Lithium-ion Battery : OK - After a full charge it delivered 12 hours of continuous audio playback and the battery indicator showed 50% remaining.
MP3 Data Transfer from PC (Windows 10) to NW-S644 Via WMC-NW20MU USB Cable : OK * WMC-NW20MU USB cable is not included in the sale *
Direct Encoding (Recording) Via WMC-NWR1 cable : OK * WMC-NWR1 cable is not included in the sale *

Audio Playback : OK
FM Tuner : OK
Audio Output : OK

BACK / HOME : OK
OPTION / POWER OFF : OK
UP / DOWN / LEFT / RIGHT : OK
PLAY / PAUSE : OK
VOLUME UP : FAIL
VOLUME DOWN : FAIL
HOLD : OK

Device Setting Details:
AVLS set to OFF
Button Operation Beep set to ON
Display set to AUTO OFF after 30 seconds
Battery Care Charging Mode set to ON 

Product Information:
Released in 2009, the Sony NW-S644 has 8GB of internal storage and features a 2.0 inch QVGA colour LCD display.
It DOES NOT support Bluetooth.
It has a built-in FM radio tuner.
It supports the MP3/WMA/ATRAC/ATRAC Advanced Lossless/LinearPCM/AAC/ and HE-AAC file formats.
It supports video playback (AVC, MPEG-4, WMV).
It supports drag and drop when transferring files.
It has a 3.5 mm headphone jack for wired audio output.
Dimensions : Width 39.7mm x Height 92mm x Depth 7.5mm
Weight : Approximately 53 grams.

Hopefully this information is clear and covers everything you need, but don't hesitate to reach out if you have any questions.