Our strips tests are the wider 3.5mm width strips and not the thin 2.5mm sold and supplied by other sellers, making them easier to read and useAll of our tests are CE Approved and FDA Cleared for shipping worldwideThese strip tests are at a sensitivity of 20mIU and work to an accuracy level of 99%Detects LH levels in urine to predict LH surge, indicating when you are most likely to ovulate and most like to conceive within the next 24-48 hoursWe have a strong environmental policy and where possible we try to use recycled packaging for all of our orders