SPECIFICATIONS Hign-concerned Chemical: None Application: Finger Item Type: Oximetry Material: ABS Size: TFT Product name: Digital Finger Pulse Oximeter Pulse Rate: 30BPM-240BPM Auto power off: 8s Display: TFT Digital Display Power supply: 2*AAA Batteries(Not Include) Color: White Power Consumption: Less than 30 mA ------------------: ---------------- oximeter: Oxygen Saturation Rate Measurement oxygen saturometer: pulse oximeter on the finger oximretro digital: Finger clip heart rate monitor oxiometer finger: For Adults, mother, babies, kids pulse oxiometer finger: pulsoksymetr oxyometer: oxymeter full oximeter: baby pulse oximeter on the finger: Pulse oximetry pediatric oximeter: professional oximeter oxymetric: digital oximeter for finger rechargeable oximeter: oxygen saturometer oxygen pulsometer: Heart rate monitor Saturation meter finger: rechargeable oximeter Oxygen saturator: medical devices digital tensiometer for finger us: neonatal pediatric oximeter oxygen saturation pulsometer: medical accessories equipment Pulsometer: bluetooth pulse oximeter oximenetro: pediatric oximeter pulse oxiometer: oxygen storation meter free nursing finger oximretro: professional oxygen saturation pulsometer oxygen pulsometer: turbine meter for finger   2.【8s Fast Measurement】 the most advanced MCU chip and sensor. Only need 8 seconds to get readings. 3.【Saving Power Consumption】 Daily use-250times or even more; continuous measurement for 24 hours. 4.【One Button Operation with Four-Way Rotation】 One button control which makes measurement more convenient and easier. 5.【Large and Clear TFT display】 Four Colors TFT and Backlight Display makes the result very easy to read. 6.【Compact and Portable】 42 gcomes with a detachable lanyard is convenient to carry on its own or inside your backpack. 7.【Visual Alert When Measuring】 the alert function. If SpO2 or pulse rate reading is below or above the preset limit, the device will alert with flash on the screen automatically. 8.【 Built-in Silicone Protector】 Built-in silicone membrane reduces the pressure of the oximeter on the finger when measurement. How to Use? If you can turn on the device, please check if the batteries were inserted correctly.