Will the device turn off automatically if BT is paired but no audio is playing? I have another that shuts off after 5 min, even when paired.

No, which makes this device slightly inconvenient for cars with power ports that stay on even when the car is off (like my 2010 Audi A3) since it won’t automatically reconnect in that case. However I found a workaround by installing one of these switches on the power line. I hide the switch under the console and just switch it on and the Tunai will automatically reconnect. JBtek Male to Female USB Cable with ON/OFF Switch - Easy Start/Reboot for Raspberry Pi & Arduino https://www.amazon.com/dp/B00UR321B6/ref=cm_sw_r_cp_tai_pQgLBb9GCQ51Q

Can this be used to connect the entertainment unit (movies and /or music) in the airplane to a set of bluetooth wireless headphones

Interesting thought, but no. Regardless of what regulations may or may not say, this device is a Bluetooth RECEIVER only, much like output-only headphones (without a mic) are. What you would need is a Bluetooth TRANSMITTER or TRANSCEIVER to send the data to your headphones.

My car has bluetooth for phone so will this be a problem? when i get in car and auto connect to both will calls still work with my cars hands free?

The beauty of this product is that will not interfere at all with your cars Bluetooth phone connection. It will just do audio. Every other product I tried interfered with phone calling because they were all designed to do both. This device is perfect for the older car with Bluetooth phone and an audio Jack input for music

Hi, is it normal that I hear a hard noice, kind of like unplugging aux cable noise, each time switching between apps or unlocking the phone?

Thanks for the great question. That is not normal. Are you able to try the Firefly with another phone to see if the issue is also present? Please write to us so we can help you more directly: care@truetosource.co. Looking forward to hearing from you. TrueToSource Customer Care

Control Method	App
Controller Type	Button Control
Control Type	pairing_and_configuration
Human-Interface Input	Buttons
Connector Type Used on Cable	Auxiliary
Number of Ports	2
Hardware Connectivity	Bluetooth, USB, Bluetooth 5
Item Weight	11 Grams
Item Dimensions L x W x H	6.3"L x 0.51"W x 0.2"H
Supported Application	Various audio streaming applications on smartphones and tablets
Compatibility Options	Smartphone, Tablet
Compatible with Vehicle Type	[Most Vehicle Types]
Supported Standards	Bluetooth 5.0, SBC, AAC, LDAC
Compatible Devices	Tablet, Smartphone
Audio Output Mode	[INFERRED] Supports SBC, AAC, and LDAC encoding
Number of Channels	2
Voltage	5 Volts
Rechargeable Battery Included	No
Power Source	Corded Electric
Bluetooth support?	Yes
Wireless Compability	Bluetooth
Connectivity Technology	Bluetooth, Auxiliary, USB
Installation Method	Plug In
Includes Remote	No
Supported Media Type	Audio
Additional Features	Bluetooth 5 . 0,Bluetooth Receiver

TUNAI Firefly Bluetooth Receiver: Worldââ‚¬â„¢s Smallest Wireless Audio Bluetooth 4.2 Adapter with 3.5mm AUX for Car/Home Stereo Music Streaming; Auto On, No Charging Needed - Car Pack (Black)

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