Permanent playing, 30mins and 60mins automatic shut-off timer
Support 3.5mm earphone
Allows you to take a deep nap in office after lunch without disturbing others.
Battery or USB operated
Powered by USB cable(included) or batteries (not included).
It can be used with adapter, USB power outlet, computer/laptop USB port, USB auto adapter.
It also canbe powered by 4 AA batteries (not included).