The Wavesense Presto Test Strips 4 Box of 50 are for use with the Wavesense Presto Blood Glucose Monitoring System only, and provide fast, accurate results. Give your fingertips a rest with alternate site testing and small sample sizes! Key Features: No coding 0.5 L sample size Fast test results Alternate site testing Store at 46 DegreeF to 86 DegreeF (8 DegreeC - 30 DegreeC)