TaoTronics Bluetooth 4.1 Transmitter and Receiver with Music Control for TV Car Sound System TT-BA08

Technical Specification:

  • Size 1.89*1.89*0.31inch
  • Weight 0.9 oz
  • Working Time Approx. 20 Hours
  • Bluetooth Version Bluetooth 4.1

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•TT-BA08 User Manual

TT-BA08 User Manual.pdf  

FAQ

the volume level on the transmitter works independently from the volume level media source. so you can max out the media volume and max out the transmitter volume to almost double its output.
It can act as a receiver for your car stereo if your stereo has a 3.5mm (1/8") aux input jack. Then your bluetooth phone will work through your stereo over bluetooth.
As far as I know, it will not turn on or off automatically. There is an On/Off button that has to be operated manually. I don't want to deal with that, so I keep it On and use a USB adapter and keep it plugged into an power strip.
That's what I've been doing. I don't know if there are any long term effects on the product, but I have a cord that allows it to charge when I start the car.
Sorry I read your question wrong. It looks like you would have to buy a new device if the battery fails.
Sure, however it doesn't have enough power to drive speakers directly...you will need amplified speakers such as the type used for computer speakers.