谭将俊 (Tham Jiang Jun) відповів о 2018-01-03 04:50:08
If I'm not wrong there is no need to calibrate it, but perhaps you'd want the scale to show your wei ...

Actually, there is a huge need in calibration. It gives different measurements (+- 1-2 kg) in different locations of the house.
And it happens to most users. Just check the reviews. Bad scale, very disappointed with the purchase. The same problem with 2nd generation.