Wellue Fingertip Pulse Oximeter Blood Oxygen Saturation Monitor with Batteries & Lanyard for Wellness Use Bluetooth Black

[ACCURATE AND RELIABLE: Accurately measures your blood 02 level pulse rate pulse strength and pulse waveform and display them conveniently on a large OLED screen. WARNINGS FOR UNUSUAL READINGS: The value on screen will flash when unusual 02 level or pulse rate is observed. Keep an eye on your 02 level and PR. FREE APP FOR ANDROID AND iOS: Use App at no additional cost. Record and store a reading up to 10 hours continuously. (ONLY record when APP is running) View real EASY TO USE: Take a reading in an easy-to-use way simply clip it on to your finger and turn it on at the press of a button. Finger probe with SMART Spring System COME WITH ACCESSORIES: Include 2 X AAA BATTERIES and a LANYARD for convenience. "Note: Its not a medical device. This device is for Sports and Aviation use only and not intended for medical use."]