Please note that this product does not have batteries, you need to buy 4*AAA batteries to use it, or plugged in by USB. Thank you.<br/>1.Description:<br />Arm Electronic Blood Pressure Monitor Portable Sphygmomanometer Heart Rate Alarm with Automatic Digital LCD Display Intelligent Pressurization Voice Broadcast Smart Blood Pressure Device<br/>2.Features:<br />- Intelligent Pressurization<br />- One-button Measurement<br />- LCD HD Display<br />- English voice Broadcast<br />- Heart rate alarm<br/>3.Parameters:<br />Item name: Arm Blood Pressure Monitor<br />Color: Black/Blue/Gray<br />Measurement method: Arm type<br />Display mode: LCD digital display<br />Memory function: Two groups of 99 memories<br />Blood pressure: 0kPa-37.3Pa(0mmHg-280mmHg)<br />Heart rate: 40next/min-195next/min<br />Measurement accuracy: static pressure: ±0.4Pa(±3mmHg)<br />Heart rate: With 5% of the read value<br />Discrimination rate: Time per minute<br />Electric source: 4*AAA batteries<br />Inflating method: Automatic inflation<br />Quick deflation: Electronic air leakage valve<br />Automatic shutdown: Automaic shutdown without operation in 30s<br />Operating environment: Temperature 0~4℃, humidity≤85%<br />Battery: 4xAAA battery (Not included)<br />Product size: 9.8*13.8*5.7 cm<br />Product weight: 220 g<br />Package size: 10.9*15.6*8.3 cm<br />Package weight: 410 g<br/>4.Note:<br />There is a little of difference according to manual measurement.<br />Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same.<br/>