Feature: 1. LCD DISPLAY: Upper arm blood pressure monitor features a large, high definition lcd display that provides clear and easy to read results, making it especially convenient for seniors and those with impaired vision. 2. IRREGULAR HEARTBEATS DETECTION: Automatic blood pressure monitor not only sensitively measures blood pressure, but also detects irregular heartbeats. This allows you to conveniently track your health status at home 3. DUAL USER MODE: Blood pressure monitor has a dual user mode, allowing up to 99 readings to be recorded and stored for two individuals. This makes it convenient for individual use or for couples to track their blood pressure over time. 4. EASY OPERATION: With its fully automatic operation, simply press the "Start" button to measure and display your blood pressure and heartrate readings. 5. CONVENIENT AND PORTABLE: Upper arm blood pressure monitor is made of durable ABS material and comes in a compact size, making it easy to carry and store. It also includes a storage bag for added convenience. Specification: Item Type: Upper Arm Blood Pressure Monitor Kit Material: ABS Size: Approx. 118 x 95 x 65mm / 4.6 x 3.7 x 2.6in Storage Temperature: -20°C to 50°C Storage Humidity: 15% to 90% Operating Temperature: 10°C to 40°C Operating Humidity: 40% to 85% Display: LCD digital display screen Measurement Method: Pulse scanning method/oscillometric method Measurement Range: High blood pressure/low blood pressure: 20mmHg to 280mmHg Pulse: (40-200) times per minute Resolution: 1mmHg (0.1kPa) Accuracy: ±3mmHg (±0.4kPa) Pulse: Within ±3% of the reading Voltage: 6V Power Consumption: 0.01W Battery: 4 x AAA batteries (not included). Package List: 1 x Upper Arm Blood Pressure Monitor1 x Arm Sleeve 1 x Instruction Manual1 x Storage Bag