I use the Freestyle lite strips in my AT meter, I found the cheapest at Amazon.co.uk, there are a lot of sellers but I order from one of the UK pharmacies. I do keep some AT strips as a back up and the cheapest I found were at Animed UK. The readings are comparable, just use the last code on the AT meter - don't change it as the Freestyle lite are supposed to be code free. Other Freestyle strips won't work.