880.6970—Liquid crystal vein locator.
        
        (a) Identification.
         A liquid crystal vein locator is a device used to indicate the location of a vein by revealing variations in the surface temperature of the skin by displaying the color changes of heat sensitive liquid crystals (cholesteric esters).
    
    
        
        (b) Classification.
         Class I (general controls). The device is exempt from the premarket notification procedures in  subpart E of  part 807 of this chapter, subject to the limitations in  § 880.9.