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 *