<p>HD OLED Display: Comes with a high-definition display, the OLED display can also be adjusted in directions, allowing you to easily view your results in any direction. Accurate: Based on all digital technologies, it is designed for non-invasive point detection. Advanced DSP algorithms can reduce the effects of motion artifacts and improve measurement accuracy. Lightweight and Portable: It is lightweight, does not take up space, so it is easy to carry and easy to use. Tips: 2 standard 1.5V AAA batteries can support more than 20 hours of continuous work (batteries not included). When the product's power is too low, it will remind you. Widely Uses: Suitable for families and hospitals, social organizations, body care during sports, etc. Fast delivery. Features: 1. Material: Plastic + Electrical Component. 2. Color: Green. 3. Batteries: 2 x 3V AAA batteries (not included). 4. Rate measurement range: 30 bpm-250 bpm. 5. Waveform display: Column and waveform display. 6. Dimensions: 37 x 35 x 60 mm. Package includes: 1 x Host. 1 x User Manual.</p>