Sphygmomanometer certified accurate to +-3 MM Hg mercury free and latex free for safety ruby jeweled movement for long life laser engraved dial face for accuracy large, easy to read dial face (6.25"/15cm) built in cuff storage basket mobile stand has adjustable height and 360degree swivel for clear viewing lifetime warranty. Same as or equal to Welch Allyn 7670-03 Mobile Aneriod Sphygmomanometer.