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:Material: ABS plasticApplicable parts: fingersWorking temperature: 5°C-40°CDisplay Format: LEDPulse Rate Measuring Range: 30bpm~250bpmPower supply: 2* 1.5V AAA alkaline battery(not included)Size: 58*32*34mmPackage Included:1pc * Oximeter (without battery)1pc * Storage bag (black)1 pc* Lanyard1pc * Manual+CertificateNotes: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.