Universal Reusable Ear Specula Set of 4 Visual Hearing Impaired Aids 38 oz) Battery life: 400 14283 38 oz) Battery life: 400 hours with BLE and 5 kHz transmission active 3% UV blocked * Color Temp: 4000K CRI: 85 * Meet all expert guidelines for clinical bright light therapy * Slightly larger enclosure increased field of illumination than the #19079 * Improved ventilation better heat dissipation * Four easy access screws vs 9 to remove lens for quick bulb changes * Power button on the side clean unobstructed profile * Easier to adjust angle height & features four height settings vs three improved flexibility for users * Attached single pedestal stand vs two indindependent legs better stability & greater ease of use * Use same key components: ballast lens material & bulbs * Two modes Therapy (3 bulbs) or task (2 bulbs) * 5 year warranty Welch Allyn Reusable Ear Specula Set for MacroView and Diagnostic Otoscopes 556 CM * Depth: 4