HD OLED Screen: Comes with a high-resolution screen, the OLED screen can also be adjusted in directions, allowing you to easily view results from all angles. Accurate: Based on all digital technology, designed for non-invasive fingertip measurements. Advanced DSP algorithms can reduce the effects of motion artifacts and improve measurement accuracy. Lightweight and Portable: It is lightweight, takes up little space, making it easy to carry and use. Tips: The 2 standard 1.5V AAA batteries can support more than 20 hours of continuous operation (batteries not included). When the product's power is too low, it will remind you. Broad Application: Suitable for families and hospitals, social organizations, sports physical therapy etc. Features: 1. Material: Plastic + Electrical Component. 2. Color: Green. 3. Battery: 2 AAA 3V Batteries (not included). 4. Pulse Measurement Range: 30bpm-250bpm. 5. Wave Display: Column and wave pattern display. 6. Dimensions: 37 x 35 x 60 mm. Contents: 1 x Device. 1 x User Manual.