Just a word of advice!
If your buying a new test kit - when it arrives do a control test (asprin or sugar) and make a note of the effects (time to colour indicators). That way in 6 / 12 / 18 months time you will be able to carry out the same control test to see if your kit is still accurate.
If your buying a new test kit - when it arrives do a control test (asprin or sugar) and make a note of the effects (time to colour indicators). That way in 6 / 12 / 18 months time you will be able to carry out the same control test to see if your kit is still accurate.