I believe they changed the display many years ago..
Purchased a few also back in 2016/17 and then another a year or two later, and the display in the newer one was clearer.
The other 3, are cheaper AC socket-meters. (WIFI, Bluetooth, and one optimised for temp) and significantly cheaper. Those 3 different models were in total around the same price as one PR10 (45US)
But they are also quite convoluted to use, and packed with anything under the sun, apps, IoT support, Google/Alexa, different app controls, WIFI and Bluetooth, and temperature metric, likely to also work with climate systems/sensors, also recall there is an air-quality pageslide.
The build & the overall use are miles better on these units from Zhurui, but also at a different price.








