The blood pressure monitor is contact screen design, three-color display, wrist measurement. It supports two-person memory records, 99 groups of memory values can be stored, voice prompts is friendly for the elderly. Features: Contact screen design, one key operation, lightweight and portable. Three-step quick measurement, 1.5 seconds to start. Three-color display, green color indicates normal range, orange color indicates slight high blood pressure, red color indicates severe high blood pressure. Wrist measurement, not need to take off sleeves, easy to measure, fit and reduce errors caused by wearing. Two-person memory records, 99 groups of memory values can be stored, scientific management of blood pressure. Voice prompts during the measurement to stop the elderly from being incapable. Equipped with a USB cable, energy once, standby for 30 days. Specifications: Material: ABS Color: Black Measurement Range: 0-280mmHg (0-37.33kPa) Applicable Wrist Circumference: 135-195mm / 5.31-7.68in Accuracy: Preesure: 3mmHg (within0.4kPa), Pulse rate: accuracy 5% Memory: 2 x 99 groups Average Function: Last 3 groups average measuring value Energy: 1 x Lithium cell, 3.7V 500mAh (included) Screen Size: 2.55 * 1.96in Item Size: 4.9 * 3.9 * 3.3in Package Weight: 110g / 3.88ounces Package Size: 130 * 100 * 80mm / 5.12 * 3.94 * 3.15in Packing List: 1 * Blood Pressure Monitor 1 * USB Cable 1 * User Manual 1 * Storage Box