Located in the heartland, our family owned business is in suburban Chicago. We know that our business is built on service excellence and we value each and every customer. Concord Health Supply, Inc. is a worldwide distributor of pulse oximeters and health supplies. We stock high quality products, usually shipped the same day as they are ordered and at the right price. We are an Authorized Distributor of Nonin, Masimo, ChoiceMMed, Contec and other brands. Our customers include individuals, doctor's offices, nursing homes, EMS, medical centers and more. We are the #1 Amazon retailer of USA made pulse oximeters! Our store on Amazon has 4.9 out of 5.0 stars with a 100% positive feedback rating.You can purchase those oximeters and more right here on our website. Customer satisfaction is our number one priority. Shop in confidence with a 100% satisfaction guarantee.