Small in volume、 light in weight and convenient in carrying.Operation of the product is simple、 low power consumption.Can display the SPO2 and PR.Low-voltage indication: low-voltage indicator appears before working abnormally which is due to low-voltage.Automatically power off function: when the device is under the state of measuring interface. it will automatically power off within 5 seconds if the finger falls out of probe.No Color choice、we sent it at randomPackage Includes:1 * Fingertip Oxymeter1 * Hanging Rope1 * Storage Bag1 * User Manual