You can only charge the watch if you buy a wristband at extra cost. With the original wristband, no matter how you put the watch down, it will not charge. It only works if you weigh it down with at least two kilos. For me, the product is absolutely unusable. It's not worth returning it because Digitec charges Fr. 10 for the opened package and the post office Fr. 9 for postage. So it goes unused and into the electronic waste bin.
Doesn't work very well with 2 smartphones (Galaxy S21 and Galaxy S22). But it says on the instructions that you can. The 2 phones don't charge to 100%, one remaining at 72% and the other at 83%, even after a full night on the "fast" wireless charger.