Specifications Accuracy of Pressure ±3 mmHg or ±2% of reading Accuracy of Heart Rate ±4% of reading Measurement Range Systolic: 60 ~ 255 mmHg / Diastolic: 30 ~ 195 mmHg Pulse rate: 40~199 / minute Memory Capacity 200 sets Communication Bluetooth Power Source 4 x AAA Dimension 145 (L) x 64.5 (W) x 29.6 (H) mm Weight 240 g (without battery) Operating Condition 5 ºC ~ 40 ºC; Humidity 15% ~ 93% Battery Life At least 200 measurements Power Saving 180 seconds Backlight LCD backlight Units per Carton 30 Net Weight per Carton 12.63 kg Gross Weight per Carton 13.63 kg Carton Size L42 x W39 x H41 cm Cuff Size Wide Range: 24 ~ 43 cm, M Size: 24 ~ 35 cm