Order Now: Our portable oximeter comes with English user manual, 2 AAA alkaline batteries, Neck lanyard, 1 year warranty and 7 x 24 customer service. Suitable For All People: New patented Finger oxygen monitor system can accomadate different skin colours. You can carry it for results at home or outdoors. This pulse oximeter fingertip is great for sports and aviat such like mountain climbers, bikers, trainers, aviators, and general sport enthusiast. Comfortable To Wear: yuwell oximeter has a noninvasive bulid-in silicon padding. It is more comfortable and better fit for long term use which can also accomadate wide range of finger sizes. Four-Direction Display: yuwell oxygen monitor fingertip allows a clear reading in all four directions, the two colour OLED screen will display real time heart rate and blood oxygen saturation in large numbers. It is thoughtful design for easy use. Reliable and Accurate: yuwell pulse oximeter will help you monitor both oxygen saturation levels (SpO2), pulse rate and pulse strength on one display. It is backed by numerous clinical tests for its consistent accurancy.