Features: 1. Wide Application: Just press the button, the finger blood oxygen meter for easy use, great for hospitals, oxygen bar, community health and sports, sports lovers and all families. 2. Easy and Efficient: 2-way rotating display for user/caregiver and auto-power-off after 5 seconds when finger is removed to saves batteries. The device needs 2 AAA batteries (Not included). 3. Accurate measurement: it is safe and reliable. High-resolution display of large screen can display dimpulso shape, heart rate, SpO2 level and battery charge. Description: 1. Fast to measure the concentration rate and the blood oxygen pulse. Specifications: Material: ABS Display: OLED display Pulse rate measurement range: 30bpm-250bpm Pulse wave display: columniation display and pulse wave display Battery: 2*AA batteries(Not included) Revolution: 1% for SpO2 and 1 bpm for pulse rate Measurement accuracy: ± 2% in stage of 70%-100% SpO2, below 70% unspecified Size: 57*31*32mm SpO2 measurement range: 0%-100% Pulse A ccuracy: ± 2%bpm or ± 2% select larger Color: White Weight: 45g Packing size: 100*100*50mm Packed weight: 50g Package Included: 1 * Oximeter 1 * hanging rope 1 * instruction manual Notes: 1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures. 2. Please allow slight dimension difference due to different manual measurement.