LSZ1002: Features: -Easy-to-use oscillometric method for professional accuracy in the home. -Hand held push button deflation. -Irregular heartbeat feature. -Pressure and pulse displayed alternately. -Uses 1 AA battery (not included). Specifications: -Available in 3 sizes:. -Small adult: Fits 5.1-7.9. -Medium adult: Fits 9.4-14.2. -Large adult: Fits 11.8-17.7. -Dimensions: 2.2 H x 3.2 W x 4.6 D.