Accurate & Fast Results- Measures accurately and quickly spo2(blood oxygen saturation of arterial hemoglobin levels), pulse rate, bar graph and pulse strength results,display it conveniently on digital LED display. Portable & Easy To Use -The light-weight oxygen monitor is about 50g(with the batteries), you only need to put your finger in the fingertip pulse oximeter testing chamber, the result will be shown. Comfortable & Long Battery Life -The CONTEC oxygen meter's fingertip clip use silica gel mairal,is soft and easy for a wide range of finger sizes, 20-30 hours battery life, automatic power off after 5 seconds. Screen is easy to see and read -The CONTEC pulse oximeter is intended for sports and aviation use only and is not a medical device. Please note:There's a very thin screen protective film which can be removed before use. What's Included -The CONTEC pulse oximeter *1,Handy carry pouch*1,Long lanyard(Neck/Wrist Cord)*1,User manual*1.