Sony WF-SP900 Help Manual page 5

Maintenance
Customer support website
Specifications
Specifications
Battery life
Maximum recordable number of songs
Supported formats
System requirements
Troubleshooting
Power and charging
The player does not function. You cannot turn on the player.
You cannot charge the battery.
The built-in rechargeable batteries become depleted quickly even after the player and the charging case are fully charged.
Computer
The computer does not recognize the player inside the connected charging case.
Playing Music
Sound becomes muffled (low volume). There is no sound.
The player does not play tracks in the desired order.
The same track or album is played repeatedly. Tracks are played in random order.
Bluetooth connection
Pairing fails.
The Bluetooth connection fails.
One-touch connection (NFC) fails.
The sound skips frequently.
You cannot hear a person on a call./ The volume of a caller's voice is low.
Others
How to maintain and clean the player after sports (swimming or running, etc.)
Tap sensors do not work. / You cannot adjust the volume.
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