Feature: Specification: Features: Adopts oscillographic step-down measurement, assures reliable and high accuracy results. The pulse rate also can be detected simultaneously while blood-pressure is measured. With high-definition large LCD display screen, convenient for you to read the data clearly. Voice broadcast function, easy to get the results without viewing the digital screen. Supports two-person data storage (99 groups of data each), more convenient to use. Adjustable armband, suitable for most persons, comfortable and easy to wear. Powered by 4 * AAA-batteries (not included), low Powers consumption. One-click simple operation, just press the button to test, suitable all types of people. Compact size and light weight with a storage bag, convenient to store and carry. Specifications: Model: KWL-B02 Material: ABS Working Voltage: D C6V Powers-Supply: 4 * AAA-Batteries (Not Included) Display Mode: LCD Digital Display Inflation Mode: Automatic Inflation Measurement Method: Oscillographic Step-Down Measurement Fast Exhaust Mode: Eletronic Vent Valve Measurement Arm Circumference: 22-32cm Air Leakage Device: Vent Value Blood-Pressure Measurement Range: (0-280)mmHg Allowable Error: ±3mmHg Pulse Measurement Range: (40-199)Beats/Min Allowable Error: ±5% The Results Showed That: High Pressure/Low Pressure/Heart Rate Memory Group Number: 99 Pair of Measurement Results Memory Operationg Environment: Temperature: 5℃~40℃; Relative Humidity: ≤80%RH; The Atmospheric Pressure Ranges from 70kPa to 106kPa Storage Temperature: -20℃~+55℃; Relative Humidity ≤90%RH The Atmospheric Pressure Ranges: 50kPa~106kPa Item Size: 159 * 100 * 39mm / 6.26 * 3.94 * 1.53in Host Weight: 218g / 7.69ounces (Excluding Batterys) Package Size: 174 * 110 * 84mm / 6.85 * 4.33 * 3.31in Package Weight: 450g / 15.87ounces (Excluding Batterys) Note: 1.This product has no backlight function. 2.Due to the different display screen and light effect, the actual color of the item might be slightly different from the color showed on the pictures. 3.Please allow a little measuring deviation due to manual measurement. 4.Please read the user manual carefully before you use the product. Package List: 1 * Sphymomanometer 1 * Arm Band 1 * Manual 1 * Storage Bag Package List: 1 * Sphymomanometer 1 * Arm Band 1 * Manual 1 * Storage Bag