USA Seller, ship out your order next day! Good gift pick for your family and friends, portable travel size, check your blood oxygen levels wherever and whenever. Fingertip Pulse Oximeter is designed for spot-checking blood oxygen saturation levels and pulse rate. Using it, athletes, pilots, and people who would like to know their SpO2 and pulse rate can get accurate readings quickly. The operation of this oximeter is simple and convenient. You just need to plug one of your fingers into the clamp and press the button on the front panel. FOR ALL AGES: Can be used as a pediatric pulse oximeter for kids and children as well as a blood oxygen monitor for adults. Power: 2 AAA BATTERIES, IT'S NOT INCLUDED IN THE PACKAGE.