I bought two packs of 10 pieces each and not even half of them worked. Firstly, it showed an E3 error and secondly, even though the tapes were not expired, the counter showed an error that they had expired and I had to set the date back 3 months for them to be accepted.
They are not cost-effective at a price of 1.7€ per piece, especially when half of them don't work and the cost doubles.
The Menarini application for Android is simply tragic, especially since I had to set the meter's date back, it was completely useless because the statistics and history were all mixed up.