Yamaha TW-E7B Noise-Canceling True Wireless In-Ear Headphones (White) - Manual (Page 51)

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 one second (blue) and turns off
(
Standby mode for pairing with Bluetooth device
Flashes (between red and blue alternately; only the primary earbud)
(
Searching for paired Bluetooth device
Not lit
(
Finished connecting to Bluetooth device
Lights up (blue, for approx. 10 sec) and turns off
(
Power off
Lights up for one second (red) and then turns off (when using the button on the earbuds to turn the power off)
(
Earbuds (L) and (R) are connecting
Flashes (blue)
(
Connection with earbud (L) and earbud (R) complete
Lights up for five seconds (purple) and then turns off
Indicator display when charging
(
Charging
Lights up (red)
(
Charging completed
Not lit
Charging case indicator display
When the charging case is not connected to a power source
(
For five 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