A:AnswerYes they definitely recommend downloading the UE megaboom app on your phone very easy to use right at your fingertips on your phone you can even turn the speaker off from your phone
A:AnswerIf there is no headphone jack/slot on the TV, you'll need some kind of adapter. Other than that option, returning it seem correct, unless you have another use, you'd like to use it for.
A:AnswerYes, you will need to use ABC01F as a BT transmitter and connect to your sound bar's AUX or RCA output port after you paired your Bluetooth headphone to ABC01F.
A:AnswerYes, if you have a AUX/3.5mm input on your amplifier, you can stream music from your Bluetooth enabled source such as a smartphone to your amplifier using ABC01F in receiving mode.
A:AnswerIf your car's USB port continue to provide power when the car is not running, then no, ABC01F will stay on and it will reconnect to your phone automatically. But if the port does not provide continuous power and ABC01F runs out of power, you will need to power it on manually but you won't need to pair it again as it will still reconnect automatically to your phone.
A:AnswerIf your SanDisk player has Bluetooth function and your receiver has an AUX input, then yes, you can use ABC01F in receiving mode to play music thru your receiver.