Silver-Ring Trigger Release Hand Aneroid Sphygmomanometer * Unit with Adult Cuff * Innovative trigger-release air valve to ensure smooth even deflation - all with the press of a button * Latex free for safety * One-piece cuff is more durable and easier to use * Thermally treated diaphragm maintains calibration * Zinc die-cast housing for mechanical stability * Double-shell ABS housing for durability * Ergonomic design works well in right or left hand * Luer lock for easy cuff-size changes * Thermally treated diaphragm maintains calibration * Polyester zipper case *