If the speaker is powered by battery or rechargeable battery:

• Replace the battery or recharge the rechargeable battery in the speaker

If the speaker is powered by USB:

• Make sure the USB cable is directly connected to the computer

Note: Do not use a hub or USB extension cable. Otherwise, the volume of the speaker might decrease after a short period of time.

The information on this page applies to the following models: SBT300/37 , SBT75/37 , SBT550/37 . Click here to show more product numbers  ›