3.5v Coaxial Ophthalmoscope (Head Only) Auto Inflate Digital BP units Advanced Averaging feature automatically displays MSHQ WA11730 Advanced Averaging feature automatically displays the average of up to the last 3 readings taken in several minutes ago Features an adjustment screw to customize rail angle to suit even the steepest stairs * Easily folds up to store out of the way and will not accidentally fall down causing an impace injuty * A machined precision tension fit hinge creates stable rock solid support * An excellent support option for sunken living rooms decks patios or 2 and 3 step stairs in garages * The P Head Only * 3 5v Coaxial Ophthalmoscope (Head Only) * Halogen HPX lamp provides 30% brighter whiter light output for true tissue color and consistent long lasting illumination * Coaxial optics produce a shadow free spot easier entry into undilated pupils and a larger field of view * Polarizing *