Pulse oximeters that are available on the market today range in cost and features, but two features are standard: pulse rate reading and blood oxygen saturation level. Our interview with Ann (Nurse at John Hopkins), revealed that the best entry oximeter available on the market is the LM-800 by Landon Medical, which sells for less than $40. The LM-800 has all the standard features, but the build quality is exceptional and it comes with a 2-year warranty and all of its accessories. Ann started out with the LM-800, but after a year she upgraded to the next model up which offered a color OLED screen. It offered all the same features, but it was much easier to read, especially since Ann is older with poor sight.