Features: 1. Easy to use: pulse rate value display, bar graph display small size, light weight, easy to carry. 2. Fine workmanship: Designed for spot check of blood oxygen saturation and pulse rate. Simple operation makes it can be opened and closed by touching the button. 3. Accurate measurement: Accurately determine your blood oxygen saturation value, pulse frequency and intensity within 10 seconds. 4. Compact and portable: being so mini and light-weight, this product does not take much space and can be easily taken away. 5. Durable material: This product is made of high quality ABS plastic material, durable and long service life. Description: This product is a finger clip oximeter, equipped with a smart spring system, suitable for people of all ages, suitable for all finger sizes from children to adults. Specifications: Color: blue Material: ABS plastic Applicable parts: fingers Working temperature: 5°C-40°C Display Format: LED Pulse Rate Measuring Range: 30bpm~250bpm Power supply: 2* 1.5V AAA alkaline battery Size: 58*32*34mm Package Included: 1 * Oximeter (without battery) 1 * Storage bag (black) 1 * Lanyard 1 * Manual+Certificate Notes: 1. Please allow 0-1 inch error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from real object.