COBY electronic Kyros MID7005-4G - Manual (Page 34)

Page 34 Optional Connections
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Connecting headphones
Connect a pair of headphones (or earphones) to the
tablet to enjoy media in private.
Lower the volume level of the tablet before connecting
headphones, and then slowly raise the volume to a
comfortable listening level.
The headphones must have a 3.5 mm (1/8 in) plug. 
When headphones are connected, speaker output 
will be disabled automatically.
Hearing experts advise against the constant
use of personal stereos played at high volume.
Constant exposure to high volumes can lead to
hearing loss. If you should experience ringing
in the ears or hearing loss, discontinue use and
seek medical advice.