Come and see our amazing products. This oximeter features with one button measurement, with finger clip design. Displayed with large red font, easy to read. Built-In bottom pad, won't oppress the finger, double sides anti-skid design, make measurement comfortable. Portable and pocket size design, measures 2 1/4" x 1 1/4" x 1 1/8". Come with a lanyard, easy to carry and use. Provides spot readings of SpO2 and heart rate for the busy healthcare professional. Reads SpO2 and Pulse Rate. Accuracy: SpO2 +/-2% / HR +/-1 BPM. Automatically standby or sleep. Powered by 2 AAA batteries( Not Included). Widely used in home, hospital, oxygen bar, community healthcare, physical care before or after sports. Pls confirm further with us if any query about packing info, inventory status and time schedule.