Fingertip Pulse Oximeters Blood Pressure Heart Rate SPO2 Monitor OLED Finger Oximeter 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, Silicone finger mould, comfortable to wear. Suitable for all ages, it is portable for home and travel. Specifications: Color: Blue, White, Gray (optional) Display Methid: LED screen, OLED screen (optional) 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: 52g / 1.7ounces 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