Feature: 1. This oximeter can measure your pulse rate and blood oxygen saturation accurately. 2. 2-way rotating display, accurate and reliable, one-button operation, just clip it on to your finger and press the button to realize fast measurement. 3. It will automatic shut down in seconds when not in use, energy-saving and eco-friendly. 4. LED display screen with large color digit simple to read, even child and elder can use it easily. 5. Ergonomic design, silicone finger mold fits your finger, comfortable to wear. Specification: Features: This oximeter can measure your pulse rate and blood oxygen saturation accurately. Bidirectional rotating display, accurate and reliable, one-button operation, just clip it on to your finger and press the button to realize fast measurement. It will automatic shut down in seconds when not in use, energy-saving and eco-friendly. LED display screen with large color digit simple to read, even child and elder can use it easily. Ergonomic design, silicone finger mold fits your finger, comfortable to wear. Lightweight and mini size, equipped with lanyard, easy to carry and use. Specification: Material: ABS Display type: LED Display direction: Bidirectional SpO2 measurement range: 70%-100% SpO2 accuracy: ±2% within the range of 70%-100%, <70%,no definition of accuracy SpO2 resolution: ±1% PR measurement range: 25~250bpm PR accuracy: ±2bpm Battery: 2*AAA batteries(not included) Item Size: 5.5 * 3.2 * 3cm/2.17 * 1.26 * 1.18in Packing list: 1 * Oximeter 1 * Lanyard 1 * User manual Package List: 1 * Oximeter 1 * Lanyard 1 * User manual