The thermometer works quite simply. We bought it because we (3 months) several times had to check the temperature in our little daily and did not want him constantly tormenting the Popo thermometer. For our purposes, it was sufficiently precise, about 0.5 degrees lower than body temperature in Po (if you know that, no problem). At near fever we have a precaution additionally measured in the Po. Annoying was only the sensor the measure after about 3 weeks was dirty with earwax. While there is a guide to cleaning with alcohol, but that you have to perform these Continuously, was us when buying not clear.
For our purposes, OK, for measurements from time to time I would always prefer a Po-thermometer (accuracy, purity ...).
