The devices I received reports that it is Si7020, not the advertised Si7021. While they're pretty much identical in spec, the 20's aren't as accurate as the 21's with moisture. I rate them one star because they don't give you what you paid for.
ICQUANZX LCR-T7 Transistor Tester: Advanced TFT Diode Triode Capacitance LCR ESR Meter
14 Review
Thermometer B.Well WF-4000 white
57 Review
Xiaomi iHealth Meter Thermometer White
24 Review
VIVREAL 4 In 1 Stud Finder Wall Scanner With LCD Display - Center Finding Beam Finder And Sound Warning For Wood, AC Wire, And Metal Studs (Black/Silver)
24 Review