Features: Voice Broadcast & Year/Date/Time Function: it will voice broadcast the test results in English after every measurement(Only The Voice Broadcast Version has this function. you can turn the speaker off as well), and the date/time feature is good for you to review the previous blood pressure history. Automatic Testing, Easy to Use: after binding the cuff on the upper arm and sit at a right gesture, then press the on/off button and the blood pressure monitor will start to measure automatically, the speed is fast and the result is accurate. Dual Users Mode & 99-group Memory: it can save measurement results up to 99 groups of each user, nice for you to keep track of your blood pressure/pulse. When the memory capacity is full, the earliest measured data will be covered by the latest one. 2.0-inch LCD Digital Display Screen: shows the test result systolic pressure, diastolic blood pressure, and pulse, large screen and large characters, and the reading is clear. Compact Portable Size: simple appearance with easy-to-operate push button control, convenient for you to monitor the blood pressure no matter where/when. Low Power Consumption: powered by 4pcs 1.5V AAA batteries, auto power off when no operation for 1 minute, and has low battery indicator. Specifications: Type: With English Voice Broadcast Function / Without Voice Broadcast (Optional) Material: ABS Memory: 99 groups Measurement Mode: Oscillometric method Measurement Range:   Pressure: 20~280 blood pressure (2.7~37kPa)   Pulse: 40~160 times/min Measurable Arm Circumference: 20~34cm Working Environment: 5~40℃, 85%, 85~105kPa Store/Transport Environment: -20~55℃, 10~93%, 50~105kPa Power Supply: 4 * 1.5V AAA battery (NOT included) Item Size: 116 * 96 * 60mm / 4.57 * 3.78 * 2.36in Item Weight: 310g / 10.95oz Package Weight: 375g / 13.24oz Package Size: 16 * 11 * 10cm / 6.30 * 4.33 * 3.94in Packing List: 1 * Blood Pressure Monitor 1 * Manual (English)