Sony MDR-ZX770BT Help Manual page 108

Help Guide
Troubleshooting
Wireless Stereo Headset
MDR-ZX770BT
The BLUETOOTH wireless communication range is short, or the sound skips.
Remove any obstacles between the antenna of the BLUETOOTH device to be connected and the built-in antenna of
the headset. The antenna of the headset is built into the part shown in the dotted line below.
A: Location of the built-in antenna
BLUETOOTH communications may be disabled, or noise or audio dropout may occur under the following conditions.
There is a human body between the headset and the BLUETOOTH device. This situation may be improved by placing the
BLUETOOTH device facing the antenna of the headset.
There is an obstacle, such as metal or wall, between the headset and the BLUETOOTH device.
A device using 2.4 GHz frequency, such as a Wi-Fi device, cordless telephone, or microwave oven, is in use near this
headset.
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