Signed LACTATE PLUS, the Level 2 Control Solution is designed to verify the accuracy of the LACTATE PLUS lactate meter and its test strips, an important step for those who regularly use the device on multiple athletes or for frequent testing. The solution has a certified lactate value in the high range, 4.0-5.4 mM, designed to verify the device's correct reading at the high end of the scale, which is most relevant during intense efforts. Periodic checks with solutions in different ranges (low and high) ensure that the system functions correctly across the entire range of use, not just at a single point on the scale. 4 ml vial.