A key symptom of respiratory illnesses is diminished lung function, which may lead to lower blood oxygen levels. If monitoring your blood oxygen levels matters to you, the Braun Pulse oximeter 1 makes it comfortable, clear and convenient. Take readings effortlessly and accurately with the simple finger clip design. See results at a glance with the back-lit, rotating OLED display. And keep it close, always, with the handy lanyard attachment. Features and Benefits Multipurpose- Measures oxygen saturation (%SpO2), pulse rate, as well as pulse amplitude. Reliable results- Clinically validated to meet European standards (CE-marked). Finger clip design- For comfortable and easy use. Back-lit, rotating display - Easy to read for clear results. Specifications Dimensions: H4 x W5.7 x D3.1cm Colour: Black Weight: 0.2kg Batteries Required: 2 x AA