They don’t come with the online kits – you can buy them online pretty easily on Amazon here – I have used ketone strips myself on the diet because it was fun – just FYI you will need to remove both the melba/grissini AND the fruits as well most likely in order to be in ketosis on hCG – learn about what I replaced those food items with here.
However, I should also point out that it is not really necessary unless you are doing the keto diet. It is not required to be on ketosis while doing the hCG. You will still burn fat even not in ketosis while on the low-calorie diet with hCG. So it really is optional.