The TRUETrack Blood Glucose test strips come in a box with 50 included and are made for use with the TRUETrack Blood Glucose Smart System Blood Glucose Monitor only. Use with any other devices may incur errors and inaccurate results. The TRUETrack Blood Glucose test strips are known for their biosensor technology and affordable price. With our prices, and free shipping, this product is a steal. Requiring only 1 microliter of blood for testing the TRUETrack Blood Glucose rest strips make diabetic produces of testing blood sugar levels easier and less painful than in the past. These test strips provide results within ten seconds. This kit also contains 1 code chip and a user's manual. Savings of over 65%! You should always shop with us first.