Why does my Kinsa Smart Ear Thermometer display FF and how do I fix it?
The "FF" reading you are seeing is likely the thermometer flashing OFF, which occurs briefly before the device powers down automatically after 30 seconds…
Manuals+ Q&A
Kinsa Smart Ear 1-Button Thermometer Instruction Manual — questions & answers
Read product questions and troubleshooting answers linked to Kinsa Smart Ear 1-Button Thermometer Instruction Manual.