The E-Sphyg Digital Aneroid Sphygmomanometer with Cuff replaces your mechanical gauge and its fragile, vulnerable design, with a virtually indestructible, digital instrument that can stand up to the toughest use (can withstand repeated drops of 5 feet or more) as well as an extra large backlit LCD that is easy to read in virtually any light. It also features a splash resistant housing for use in harsh environments; a swivel cuff clip that allows the manometer to be re-positioned for easy viewing; an auto off function which conserves battery strength; dual low battery warnings; a recalibration reminder after 10,000 cycles; and systolic assist that alerts a practitioner to the onset of korotkoff sounds which also makes this a great training aid.