Review on JBL Tune 120 TWS Wireless Headphones, Black by Jnis Zels ᠌

I'm tired of trying to synchronize them, it turned out a couple of times by accident, in other cases only the right earpiece works. This hurts my ear. Can someone explain how to synchronize them? In the video on YouTube, when asked to synchronize, the boxes are twisted for 10 minutes, but in the case - nothing. PS: the sound is good in the right earpiece, the left one works on a rotational basis. Work for a week, rest for a couple of months