Each tub of 5 comes with its own code chip which fits in the back of the meter.
For accurate readings, this must be inserted (after removing the previous one) when you start a new tub of strips.
All strips should be used within 3 Months of first opening the tube (see tub).
The maximum shelf life of the strips, from the time of manufacture, is 12 months.
10 pots or more @ £6.30 each