Universal Extension Wrench Set Offset Ratchet Spanner Extender Adapters Socket 80pcs 60x60cm Indoor Toilet Training Puppy Pet Dog Pads to meet the charging needs to meet the charging needs of different devices don't talking or moving when measuring Sit in a comfortable position and rest your arm on a table at approximately heart level for the reading Note that your blood pressure can vary significantly in as little as a few minutes For maximum accuracy you can use the option to average your last 3 readings Specifications Measuring range :Blood Pressure : 30~280 mmHg Pulse Rate : 40~199 beats min Calibration Accuracy : Blood Pressure : ± 3 mmHg Pulse rate : ± 4% of reading Operating environment : 50 °F ~104 °F with relative humidity up to 85% (non condensing) Storage Transportation environment : with relative humidity up to 85% (non condensing) Power Source :2 x 1 With 3Pcs Adapters: Equipped with 3pcs adapters of different specifications simple operation and strong practicability