A:AnswerHi ROSA, it will depend on how you want to use it. If you want lights effects and the capability to pair with multiple speakers, go with the XB20. If you want longer battery life, the XB3 is where it's at, it also has the capability to pair with another speaker, however, with another XB3 only. You may refer to these links for more information about the two speakers: https://docs.sony.com/release//specs/SRSXB3_mksp.pdf | https://docs.sony.com/release//SPECS/SRSXB20BLK_mksp.pdf Regards, -Mark
A:AnswerYes you can, this speaker also has capability to add additional speakers although this unit will fill the room with quality sound on its own. It also features an excellent bass boost.
A:Answer4g? Perhaps you meant 4K? The resolution of the tv is irrelevant. If it has Bluetooth capability the your good to go. It has a connect to tv feature
A:AnswerHello Videophile! We recommend verifying if your sound bar is capable of setting the Bluetooth function as a transmitter instead of a receiver, if you determine that it is possible just verify if it is compatible with the following Bluetooth profiles to be able to connect this Portable wireless speaker unit: A2DP (Advanced Audio Distribution Profile), AVRCP (Audio Video Remote Control Profile), HSP (Headset Profile), HFP (Hands-free Profile).~Jeannette
A:AnswerHello TimmyB, thank you for your comment. The speaker can be operated by connecting it to an AC outlet via AC adapter (supplied) or built-in battery (rechargeable). We recommend charging the battery to its full capacity once every six months to maintain its performance. If you need to replace the built-in battery you will need to contact your nearest Sony dealer.
-Kate
