The Accu-Chek Mobile meter checks the validity of the test cassette. If either of the two dates – use by period or use by date – is exceeded, you will not be able to perform any more tests with this test cassette. If you start a test and the validity of the cassette is about to expire shortly or has already expired, the meter will inform you of this. The first notification appears 10 days before the validity of the cassette expires, the following appear 5, 2 and 1 day(s) before expiry. If the validity of the test cassette has expired, a message appears which informs about the expiry of the cassette and asks you to insert a new cassette.