Yamaha YH-E700B Wireless Noise-Cancelling Over-Ear Bluetooth Headphones (Black) - Manual (Page 12)

Turning on the power
Here’s how to turn this product on.
1
Hold down the power key for three seconds.
The indicators light up as shown below, and the power turns on.
R
Blue
Lights up for 1 sec
3 sec
Related links
“Remaining Battery Power” (p.14)
12
Charging and Powering > Turning on the power