Small in size. High accuracy. Digital technology. Low power consumption. Easy to operate. The Fingertip Pulse Oximeter is a non-invasive device intended for the spot-check of oxygen saturation of arterial hemoglobin (SpO2) and the pulse rate of adult and pediatric patients in home and hospital environments (including clinical use in internist/surgery, anesthesia, intensive care ect). Main specifications: Quantity: 1 PC; Dimension: 81 mm(L) x 68 mm (W) x 49 mm(H): Operating Environment: Temperature: =10 degrees. C. - + 40 degrees C. Relative humidity: less than 75%; Atmospheric Pressure: 700 hPa - 1060 hPa. http://www.contecmed.com People's Republic of China.