Precision Xtra system tests both blood glucose and blood ketone all with the same meter using the Precision Xtra blood glucose test strips and Precision Xtra blood ketone test strips. We are devoted to providing the Medical products you need, all affordably priced, to cater to your medical requirements where and when needed. Find affordable items for patients and caregivers of top quality for complete reliability. Precision Xtra Blood Beta Ketone Test Strips are for use with Precision Xtra meters. The test strips are designed to quantitatively measure blood Beta ketone (Beta-Hydroxybutyrate).