Cannice iblue8 Bluetooth Headset (sound's testing)
Let's compare the sound from the phone that comes through the cable to the speakers with the sound of the bluetooth. It is advisable to have a speakers or headphones with a wide range of frequency, for example from 30 to 16000 of Hz.
At first, sound will come from speakers and then from Bluetooth. Just listen.
https://www.gearbest.com/earphones/pp...