Tycos Classic Pocket Aneroid Blood Pressure Classic Pocket Aneroid Sphygmomanometer * Unsurpassed reliability in a traditional cuff-mounted design * Certified accurate to+/- 3mmHg * Latex free for safety * Ruby jeweled movement for long life * Laser-engraved dial face for accuracy * One-piece cuff is more durable and easier-to-use * Thermally treated diaphragm maintains calibration * Zinc die-cast housing for mechanical stability * Recessed dial face reduces parallax * Includes: zippered leatherette case cuff bladder gauge and valve