Arrived without Chainrings , and without charging cable. In the box was a letter to say that the seller didn't have the chainrings in stock, and rather than telling me this, he just sent it without the chainrings giving me no choice but to hope that he will send the chainrings. So I am left in a situation where I can't test the product, and have to wait another 6 weeks before the chainrings arrive, and by that time naturally Ali express won't care of the power meter doesn't work. I will update when I can finally test the product , but I am not pleased with being sent without chainrings. It shows no respect to the buyer who will be anxious that the product will not work, or unsure that the chainrings will be sent. I do hope that everything will be okay in the end, but please seller , communicate with the buyers if you do not have all of the order.
Finally got my chainrings that were not originally sent. Power meter appears to work fine. so all good. I'd order again, but message seller first to ensure he has all the parts in stock before sending.
Thank you for the good product.