Wireless Noise Canceling Stereo HeadsetMDR-ZX550BN

Resetting the headset

If the headset cannot be turned on, or if it cannot be operated even when it is turned on, set the headset in charging status, then press the POWER and VOL- buttons simultaneously. The headset is reset and turns off.

After resetting the headset, turn it on. If it does not turn on, consult your nearest Sony dealer.