The fingertip oximeter is used to measure blood oxygen saturation levels and pulse rates, one-click measurement, quickly and accurately. It is small and portable, suitable for family use to care for body health. Features: High-definition L-ED display screen, clear to view. Small and lightweight, simple one-click measurement. Detect the blood oxygen and pulse rate quickly and accurately, with abnormal alarm. Silicone finger mould, comfortable to wear. Suitable for all ages, it is portable for home and travel. Specifications: Material: Lastics Color: Blue, White (optional) Display Methid: L-ED screen Blood Oxygen: 0%-100% ±2% Pulse Rate Display: 0-250bpm ±1bpm Working Current: ≤50mA Operation Mode: Intermittent Cell: 2 x AAA alkaline cells (not included) Item Size: 57.3 * 33.2 * 32.2mm / 2.26 * 1.31 * 1.27in Package Weight: 47g / 1.66ounces Package Size: 93.3 * 63.9 * 39.6mm / 3.67 * 2.52 * 1.56in Packing List: 1 * Fingertip Oximeter 1 * Hanging Rope 1 * User Manual