TrekStor i.Beat soundboxx BT Notice D'utilisation page 28

Avoid using USB cables over 3 m in length.
Exposing the device to electrostatic
discharge can interrupt the data transfer
between the device and the computer or
impair the functions of the device. Should
this happen, disconnect the device from the
USB port and reconnect it.
Repair
WARNING
No parts inside the device require
maintenance or cleaning.
WARNING
Should water enter into the device, turn it
off immediately. Ensure the device is
checked for operational safety before using
it again.
Intended operating conditions
Protect the device from extremely high or
low temperatures and fluctuations in
temperature. Use it at an ambient
temperature between 10º C and 40º C.
Do not place the device near a heat
source and protect it from direct sunlight.
EN 28