Features: 1. Lightweight & Easy Carry 2. Real-time Spot Check 3. OLED Display Specifications: Color: Blue Display Type: OLED Screen Display SpO2 Measurement Range: 0% ~ 99% PR Measurement Range: 30bpm ~ 250bpm Power: 2 x AAA battery Power Consumption: below 30mA Automatic Power-off in 5 seconds when no finger inside the oximeter Device Dimensions: 57mm*32mm*33mm Box Included: 1 x Pulse Oximeter 1 x Product Manual 1 x Lanyard [FREE GIFT] 2 x AAA Batteries