5098-42 Welch Allyn DS66 Trigger Aneroid with Adult Cuff, Child Cuff and Case5098 42 Welch Allyn DS66 Trigger Aneroid with Adult Cuff, Child Cuff and Case Maintain accurate blood pressure readings with lower lifetime cost with gear free DuraShock technology, the first major innovation in aneroid technology in nearly 100 years. The DS66 Trigger features an innovative trigger release design for easy operation. Shock resistant to maintain accuracy with lower lifetime cost can withstand up to 30 inch drop and remain in calibration