Yamaha TW-E7B Noise-Canceling True Wireless In-Ear Headphones (White) - Manual (Page 46)

3
After the power turns off, hold down the function key and the + (plus) key for 10
seconds.
Make sure that the indicator lights up as shown below.
10 sec
Earbud (L) Earbud (R)
Flashes
purple twice
Blue
Lights up for 1 sec
Blue
Flashing
Purple
Lights up for 5 sec
Red and blue
Flashing
Earbud that is now primary
Flashes
purple twice
Blue
Lights up for 1 sec
Blue
Flashing
Purple
Lights up for 5 sec
4
Place earbuds (L) and (R) in the charging case.
The earbuds are now initialized (factory reset).
Related links
“Pairing for the First Time” (p.17)
46
Troubleshooting > Initializing (performing a factory reset)