Bluetooth Transmitter Receiver 3 in 1, Dual Pairing Blutooth Transmitter Receiver Wireless Audio Adapter with LCD Display 3.5 mm AUX Stereo Output for TV, PC, Laptop, Headphones, Car, Earbud, MP3

the volume is too low

Tested the transmitter mode by connecting to my laptop through AUX cable and pairing the device with my Sony XM4 earbuds. Pairing to my earbuds was easy and the display feature to choose the to-be-paired/paired devices are a huge life saver compared the devices I've owned before. Tested audio latency with several youtube videos and found very minimal latency (1/10th of a second) that you wouldn't even notice while watching videos or movies. No lip sync issues so far. Have to test it in an airplane entertainment system to confirm this. Battery not tested, will also do it during an airplane travel and update the review. Build quality is okay for the price point, nothing great to write home about.Would typically give 4 stars for now and make it 5 once the battery test is done BUT I received an used product. There were visible scratches on the display caused by regular use wear, some minor use marks in the body/buttons and the packaging wasn't sealed and not properly done. All this points to a pre-used product. Hence, taking out 3 stars in my review for this. Its understandable that a lot people buy the products, test it and return it but it should not be used to the point were you can literally see scratch marks on the display. This one seem to be heavily used by the previous owner and that is completely unacceptable.