Sony WH-CH710N Help Manual page 97

Wireless noise canceling stereo headset

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Help Guide

Wireless Noise Canceling Stereo Headset

WH-CH710N

The remaining battery charge of the headset is not displayed on the screen of

smartphone.

Only the iOS devices (including iPhone/iPod touch) which support HFP (Hands-free Profile), and Android

smartphone (OS 8.1 or later) can display the remaining battery charge.

Check that the smartphone is connected with HFP. If the smartphone is not connected with HFP, the remaining

battery charge will not be correctly displayed.

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