Specification: 1 Method of Measurement: Oscillometric 2 Range of Measurement: 0-300mmHg 3 Unit Dimension: (L) 70 x (W) 75 x (H) 29mm 4 Storage and transport temperature: -20c to +50c 5 Sets of memory: 48 sets 6 Power Source: ?AAA? Alkalinex 2pcs Function: 1 Measures Blood Pressure, Pulse From The Wrist; 2 Large Clear Display Readout; 3 Simple, Safe, Fast and Accurate; 4 Sleeve Device for use on wrist; 5 Multi-features display showing 3 values-syslotic, Diastolic, Pulse and Month, Date, Hour, Minute; 6 No pressure preset necessary but to oscillometric measuring technique; 7 Memory Function.