Keto Mojo has the best priced testing strips by a mile. I've been using and recommend their meter to anyone who wants more insight into their ketogenic diet. I've also compared them to Precision Xtra meters and the results were close enough for me to make the switch.
Lancets
These plug into the lancing device that comes with the testing device.
Alcohol Swabs
For disinfecting your finger before you lance your finger.