I bought the Tristar because my child does not like the fever knife in the butt and wept bitterly always has it. At first I was very excited, child has the measure with this device also super participated, but now the blockbuster. Since my child develops a fever and I measure as usual with the Tristar only to end then in the ear. Both shows 37 degrees. Once you head touched so could have a steak fry it ;-). So I was completely sure I've then as he slept with the other Popo thermometer measured again and almost fell from the clouds. The thermometer shows me 40.8 degrees. We have then tested a few more times and always displayed the same still 3 -4 degrees colder than it really was. So very funny and absolutely not recommended. I
