to keep the battery healthy, the unit should be charged at least every 6 months. if not used for a long time, it may not charge again.
ambient working temperature:10°–35°C (50°–95°F)
ambient storage temperature:0°–35°C (32°–86°F)
clean the shell of the unit with a lightly damp cloth. let dry before usage.
caution
do not try to charge or use a unit with a seemingly damaged battery.
only a battery supplied by teenage engineering installed by qualified personnel should be used.
disposal of a battery into fire or a hot oven, or mechanically crushing or cutting of a battery, can result in an explosion.
leaving a battery in an extremely high temperature surrounding environment can result in an explosion or the leakage of flammable liquid or gas.
to prevent possible hearing damage, do not listen at high sound levels for long periods.
store small parts out of the reach of children and infants. if accidentally swallowed, contact an emergency medicine doctor immediately.