TD 4183 test strips when used together with Accusure Simple TD 4183 Blood Glucose Monitoring System, allow your blood glucose levels to be measured by yourself at home or by healthcare professionals. TD 4183 strip use fresh capillary whole blood sample from the finger, palm, upper arm or fore arm. Sample Size: 0.5ul Reaction Time : 8 seconds Hematocrit Range : 20% to 65% System Measurement Range : 20 mg/dl to 650 mg/dl. FOR USAGE ONLY WITH ACCUSURE SIMPLE GLUCOSE MONITOR TD-4183.