Useable With USB Cable This model fully automatic digital blood pressure monitor for measuring upper arm can easily and fast to measure blood pressure and pulse number. Name: Full-automatic arm blood pressure monitor Display: LCD liquid crystal display Measurement method: oscillographic detection method Transport and storage environment: humidity -20 ~ 55 ? humidity 10% ~ 90% RH Measurable arm circumference: about 22cm ~ 32cm Weight: about 450g Power Supply:DC 6V (4 x AA Battery)/ USB Cable Measurement completed promoting voice Automatic digital blood pressure monitor has one-touch automatic operation, latex-free patented universal cone cuff, average of last 3 readings, movement detection, real fuzzy technology, hypertension risk indication, irregular heartbeat detection, 90 memories, 11.2 x 10.2 x 16.2 cm dimensions.