I placed the order on 29-Nov-19 and even after 65 days I did not receive the item. When I complained about the non-receipt of the item, I got a prompt refund. I appreciate both the seller WorldChips and AliExpress for their customer-friendly approach and the promptness with which they solved the customer's problem. I will be placing an order for the same item soon with WorldChips.
all peaces are working. dot LED forward voltage is ~1.9V, for all other segments - 3.7V