Yamaha YH-E700B Wireless Noise-Cancelling Over-Ear Bluetooth Headphones (Black) - Manual (Page 46)

List of support centers
If the trouble still cannot be solved, please contact us for product support as shown below.
For customers within Japan
(
Please contact the store where you purchased this product, or the Product Support Center as listed in the
“QUICK REFERENCE GUIDE” included with this product.
For customers outside of Japan
(
Please contact your nearest authorized Yamaha dealer or service center.
https://manual.yamaha.com/av/support/
46
Troubleshooting > List of support centers