Sony WH-CH720N Help Manual page 105

Help Guide
Wireless Noise Canceling Stereo Headset
WH-CH720N
To prevent burning or malfunction due to getting wet
On waterproof performance of the headset
The headset is not waterproof. If water or foreign matter enters the headset, this can result in burnout or malfunction.
Avoid situations such as the following and be careful not to get moisture or dirt on the headset.
Using the headset in the rain or snow
Touching the headset without drying wet hands after doing housework in the kitchen or washing hands in the
washroom
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