The Welch Allyn DS66 Sphygmomanometer is reliable and hassle free. This unique gauge features a trigger-style air release valve and ergonomic design for comfort and easy operation. With gear-free DuraShock technology, you can count on the DS66 to remain in calibration longer than traditional aneroids, providing more accurate readings over time and helping to improve practice efficiencies. • Gear-free Durashock technology • Certified accuracy to +/- 3 mmHg • Reliable and unique trigger-release design • Can withstand up to a 30-foot drop • Soft comfort grip and trigger valve for smooth, one-finger operation • Latex-free Comes with 4 reusable Flexiport cuffs: • 1x large adult cuff • 1x small adult cuff • 1x small adult cuff • 1x child cuff