A:AnswerThe grill is fused to the face panel and cannot be separated without braking it off. What I do for mine, is air blow it was a fairly large/powerful air compressor.
A:AnswerThe battery supply voltage is 21.6 v. You cannot connect to a 12 v power supply. It needs to connect to a 120 v outlet to convert to the necessary voltage to charge the battery, which is 24.9 v.
A:AnswerIf your looking for it to screw in/mount from the bottom, no. Not sure what other types of mount you might have but the edges & corners are kind of rounded so I don’t see being able to stabilize it very well.
A:AnswerHi Wani,
Unfortunately, the GTKXB90 doesn't have a remote control. We recommend our Sony music center app to control some functions of the speaker.
Happy shopping & thanks for your interest in Sony!
Regards,
David