Haier G31 User Manual page 44

Safety Information
lower its SAR value.
If you are not using an approved accessory ensure that whatever product
is used is free of any metal and that it positions the phone the indicated
distance away from the body.
Organizations such as the World Health Organization has stated that if
people are concerned and want to reduce their exposure they could use
a hands-free device to keep the phone away from the head and body
during phone calls, or reduce the amount of time spent on the phone.
As mobile devices offer a range of functions, they can be used in
positions other than against your ear. In such circumstances the device
will be compliant with the guidelines when used with headset or usb data
cable. If you are using another accessory ensure that whatever product is
used is free of any metal and that it positions the phone at least 1.0 cm
away from the body.
To prevent possible hearing damage, do not listen at high
volume levels for long periods.
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