Dr. Talbot’s Pulse Oximeter can be used to quickly and accurately measure pulse oxygen saturation and pulse rate through a user’s finger. It is suitable for both aviation and fitness purposes and is ideal for use by hikers and backpackers, cyclists, pilots, or anyone wanting to track their pulse oxygen rate on-the-go. The Pulse Oximeter features a multidirectional digital display that automatically adjusts the screen to make viewing measurements even easier. The included lanyard and lightweight design make it easy to take the Pulse Oximeter on-the-go. · Easy to use and read · Quick and accurate · Multidirectional digital display · Convenient for travel · Power efficient This device is not a toy and should be kept out of a child’s reach when not in use. For use by an adult or under strict adult supervision. See instruction booklet for further warnings and information. Product contains 2 AAA non-mercury alkaline batteries. Batteries are replaceable.