I have perhaps not strictly followed strict instructions, at least the Bluetooth connection with the balance has become random, making it lose much of the pleasure of this machine. When she wants to work well, it's great. I know not what evil algorithm engineers have responded to this Bluetooth connection, I have not had this kind of phenomenon with any other device. Oh yes, for those who complain that the balance does not show their weight, it is imperative to put the scale on a hard surface - for example on carpet weight is easily halved - and curiously it does not appear in the user manual.