ADC Pro's Combo II DH Adult Dual Head Pocket Aneroid/Scope Kit with Prosphyg 768 Blood Pressure Sphygmomanometer and Proscope 670 Stethoscope, Teal Precision crafted manometer exceeds industry standards for accuracy Color matched cuff and matching case ADCUFF nylon cuff with Size Guide marking system helps prevent miscuffing Color coordinated dual head stethoscope 20 year calibration warranty