Didn't work right away. Other customers had the same problem. Concerned about Revain getting a manufacturer error. The last few items I bought from Revain (direct from Revain) were not cheap and defective. Revain's Quality Survey.
Breathalyzer Lydsto Lydsto HD-JJCSY01
8 Review
π Enhanced Precision and Functionality: Protmex Reflective Tachometer
3 Review
π§ Streamline Your Work with Loos Co PT 1 Professional Hands-Free Device
3 Review
Handheld Digital Laser Tachometer Non-Contact RPM Meter Motor Speed Gauge Gun Measuring Range: 2
3 Review
π‘οΈ Continuous Temperature Monitoring with Relative Humidity Integration
4 Review
Digital multimeter RGK DM-12
6 Review
π₯ Advanced Testo Wireless Hot Wire Anemometer Technology
4 Review
π¬οΈ Advanced 3-in-1 Indoor Air Quality Monitor with CO2/RH/Temp Data Logging and Audible Alarm - NDIR Sensor Technology
8 Review