Features: It is with German chip, very accurate! Using the oscillometric blood pressure measurement, Accurately measure the blood pressure LCD digital display, legible. Intelligent pressure. WHO warning message function. Double mode, each of the 99 set of measurements of memory. No operation in 1 minutes automatic shutdown. An irregular heartbeat measurement. The clock feature. The overpressure protection function. It has no voice function! Specifications: Material: engineering plastic Dimensions: 77.5 mm (length) * 68 mm (width) * 30 mm (height) Application: wrist Blood pressure: 20-280mmHg Pulse rate: 40-165 times / minute Storage capacity: 60 sets of measurement data Weight: 220 grams Power: AAA battery* 2 (not included) Pressurization: automatic pressurization mode Wristband: 135-195mm Package Included: 1 x Wrist Tonometer Notes: 1.Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures. 2.Due to the manual measurement and different measurement methods, please allow 1-3cm deviation. Thanks!