A:AnswerHi! You can only connect devices via audio in (3.5mm jack) and Bluetooth. USB playback is not available. The micro USB port of this speaker is used for charging purposes only. -Anthony
A:AnswerHello Lexi11! The Speaker Add function available in the SRS-XB3 requires to have 2 separate units with the same model, unfortunately the SRSX33 unit doesn't have the capability to use this feature, it will only allow you to have the audio sent through a mini stereo plug from an external device through the AUDIO IN port available.~Jeannette
A:AnswerHi mondo,
You can still use this speaker while its charging however, we highly do not recommend. Fully charge the speaker first before using it for better listening experience.
Thanks,
>Joffrey
A:AnswerHi Lulu, We do not recommend leaving the speaker in a location near heat sources, in a place subject to direct sunlight, excessive dust, moisture, rain or mechanical shock. This speaker is not water resistant. «Jerome