Yamaha TW-E3C True Wireless Earbuds (Red) - Manual (Page 56)

List of indicator displays and audio messages
The indicator displays and audio messages on this product are shown below.
Earbud indicator display
(
Power on
Lights up for 1 second and turns off
(
Standby mode for pairing with Bluetooth device
Flashes (only the primary earbud)
(
Searching for paired Bluetooth device
Not lit
(
Finished connecting to Bluetooth device
Lights up (for about 10 seconds) and turns off
(
Power off
Lights up for 1 second and then turns off (when using the Touch Control on the earbuds to turn the power off)
Indicator display when charging
(
Charging
Lights up
(
Charging completed
Not lit
Charging case indicator display
When the charging case is not connected to a power source
(
For 5 seconds right after placing the earbuds in the charging case
Shows the remaining battery power of the charging case and turns off
When the charging case is connected to a power source
(
Shows the remaining battery power of the charging case
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Appendix > List of indicator displays and audio messages