Product review (3 stars): It does not look like one either
My meter is labeled Peakmeter MS6508. It is made in China and most likely is a counterfeit product, which does not have any correlation to Hyelec. I have to admit - it works and provides a reasonable accuracy on both temperature and relative humidity. It is quick to react to changes in ambient conditions due to the fact the sensor is very small and attached to the main board via a tiny neck. There is no way the sensor is Sensirion SHT75 from Switzerland, I would never believe that. It does not look like one either.

The meter is quick, but not immediate. You have to wait a few minutes to let the readings to stabilize.
The meter takes four AAA size cells and my biggest problem is with these cells. Regular AAA cells do not fit in the battery compartment in the back - it it too short to accept a battery length. I was barely able to insert Chinese batteries there, it appears they are a little smaller than other batteries, available in the USA. Ideally each battery space should have been 2-3 mm longer. I have never seen such poor design, not even from China.