The Quest fingertip pulse oximeter with backlit LCD Display is designed to provide an easy, accurate and affordable way to spot check pulse rate and blood oxygen saturation levels SpO2. The Quest fingertip pulse Oximeter is widely used in a variety of settings such as sports and athletics, home health and during aviation by pilots to obtain accurate oxygen saturation readings. Specifically manufactured to be lightweight and portable the single button operation of the Quest fingertip pulse oximeter provides a complete oximetry solution. Displays, indicators and keys SpO2 LCD display. Pulse Rate LCD Display. Keys power button and display button SpO2. Range 35% to 99%. accuracy plus or minus 2% during 75% to 99%, plus or minus3% during 50% to 75%. Resolution plus or minus1%. Pulse Rate. Range 30 to 240. Accuracy plus or minus 2 or plus or minus 2% whichever is greater. Resolution plus or minus 1 Power. Two 2 AAA alkaline batteries. Battery life 30 continuous hours of operation. Dimensions and Weight. 2.6in x 1.4in x 1.3in, 66mm x 36mm x 33mm. 2.1 ounce 60g including batteries. Operating and Storage Environment. Operating Temperature 41 degree to 104 degree fahrenheit 5 degree to 40 degree celsius. Storage Temperature 14 degree to 104 degree fahrenheit minus 10 degree to 40 degree celsius. Includes Quest Fingertip Pulse Oximeter, Carrying Pouch, Lanyard, Instruction Manual, Two 2 AAA Batteries.