Model name ORO-N4CLASSIC Oscillometric measurement method Measure range: Pressure: 0 ~ 280mmHg Pulse: 40 ~ 199 beats / minute Measurement accuracy: Pressure: 3 mmHg Pulse: 5% Max. Inflation Automatic Inflation (Air Pump) Deflation Automatic air release control valve Display: liquid crystal display Memory: 2 x 120 memories LCD screen dimensions: 40 x 60 mm Unit dimensions: 118 x 110 x 52 mm (L x W x H) Unit weight: (approx. 225.5 gr) (Excluding cuff and battery) Cuff size: 22-40 cm Storage / transport Environment: Temperature: -25 ~ 70 ° C (-13 ~ 158 ° F) / Humidity: 93% R. H. Working environment: Temperature: 5 ~ 40 ° C (41 ~ 104 ° F) / Humidity: 15 ~ 93% R. H. Power supply: Alkaline battery DC 6V, AAA (LR03) (1.5V) x 4 pcs. Or from DC6V micro USB power adapter (requires separate purchase) Energy saving mode After 30 seconds without operation, the device automatically turns off. Accessories 4 AAA alkaline batteries (LR03), cuff with tube, user manual. Manufacturer's warranty: 24 months Storage / Transport - Environment: Temperature: -25 ~ 70 ° C (-13 ~ 158 ° F) / Humidity: 93% R. H. Working environment: Temperature: 5 ~ 40 ° C (41 ~ 104 ° F) / Humidity: 15 ~ 93% R. H. Power supply: Alkaline battery DC 6V, AAA (LR03) (1.5V) x 4 pcs. Or from DC6V micro USB power adapter (requires separate purchase)