Plastic, Nylon. No. 1 doctor and pharmacist recommended home blood pressure monitor. Comfortable and simple to adjust, the pre-formed ComFit Cuff inflates around the entire arm ensuring the brachial artery is compressed for a more precise reading. Multi-colored indicator lights clearly show how your reading compares to normal home blood pressure levels. Feel empowered by accuracy with technology that automatically displays the average of your last 3 readings taken within the last 10 minutes and detects irregular heartbeats. Track your health with increased memory storage allowing you to monitor and store the last 120 readings for more than one person. Feel empowered by accuracy with technology that automatically displays the average of your last 3 readings taken within the last 10 minutes and detects irregular heartbeats.