The Accu-Chek Instant Test Strip a box of 50 strips goes along with the Accu-Chek Instant Glucometer which is made to measure the glucose level in blood and keep a check on it. Since it is extremely simple and easy to use the manual is not included in the pack. It is simply a refill of 50 Accu-Chek instant strips for your existing Accu-Chek Active Instant. The strips can be used until the expiry date printed on the pack even after opening the same. These strips can be used to measure glucose in all types of blood including venous arterial or even neonatal blood.