Precision Xtra test strips have been designed to prevent inaccurate tests and test strip wastage caused by interferences from many common substances** and/or application of inadequate sample volume. Application of inadequate blood samples in some blood glucose monitoring systems can potentially lead to erroneous results or error messages which means wasted test strips. A unique fill trigger prevents the test from starting until an adequate blood sample is applied. Simply add more sample within 30 seconds and the Precision Xtra meter produces a result, without compromising accuracy. With a 450 result memory, downloading feature and large easy to read display, the Precision Xtra system can handle all your blood glucose testing needs.*Not available for distribution to HME dealers**Examples include Uric Acid, Vitamin C, Sulfonylureas and Aspirin.