Problem of GM-2 Gaussmeter

The problems that occur in the GM-2 Gaussmeter are: 1. When first turned on, the number is not immediately 0 even though the probe is far from the magnetic field. 2. When first turned on, the unit of measurement automatically selects the kilogauss, which should select the gauss first. 3. The unit of measurement cannot be changed to gauss automatically. There are also no hints or buttons to switch units. 4. If it is an automatic measurement to kilogauss, the digits should include decimal places. If the measurements are correct, then when I measure the reference magnet with a strength of about 11000 - 12000 Gauss, the tool should display the numbers 11.0 - 12.0, but when I try it (as seen in the video), the gaussmeter displays the numbers 100-120 in kilogauss units. Isn&this really wrong?