I bought this thermometer because my daughter, who was 6 months old at the time, was running a fever. She screamed the whole way through when we tried to take a temp under her arm, so I thought taking a one-second temperature in her ear would be most comfortable for her.
We ended up buying her the American Red Cross Model: Y7049. I got her home and took her first temp and it was 94.2 degress. We took it again with the same result. We changed the cover for the ear piece and tried it again. I was being careful to do it right. (I'm in nursing school, I'm training to do this.) This time it read 104.6. But she wasn't that hot!
We went to Target the following day and exchanged the thermometer for a new one. Adrianna was feeling better so there was no reason to use the new one. About a month after purchasing our new thermometer I opened it to take my 8 year old sons temperature, it read 93.5!
Do NOT buy this thermometer. It does NOT work. It has matched my regular thermometer maybe 2 or 3 times ever. And even then you have to wedge it into the ear so hard it's painful. This is a horrible thermometer.