Bluetooth codec APTX

This little box allows you to listen to audio files on an old stereo with excellent quality.
Goodies: connects easily to the chain, immediately recognizes the bluetooth connected devices (tablets,
smartphones, PC), operates aptX (pledge of very good sound reproduction) but also accepts A2DP and CSR, the sound is powerful (no need to mount the amplifier in the chain), listen to Deezer streaming with top quality.
Cons: no stop button, the LED blinks continuously, you can connect only one terminal at a time
(You have to disconnect one before connecting the other), even over short distances there are breaks in his quite frequent.
Given the price, very good investment.