Review on Testo 0560 8312 830 T1 Thermometer by Charley Martinez

Read instructions before use. Yes unbelievable. I wanted to change the units from Celsius to Fahrenheit and followed the instructions exactly. So I called the manufacturer and asked for support. After contacting support I was told to send it back to the Testo manufacturer. I spent $23 on shipping and 2 days later they told me the manual was inaccurate and they told me on the phone how to change units. I got the same device back from the manufacturer and it works fine but cost me an additional $23.