Ophthalmoscope Head 3.5V Halogen Coaxial LED, Head OnlyWelch Allyn 3. 5V Halogen Coaxial Ophthalmoscope with LED, Head Only Power Handle is Sold Separately Coaxial optics with LED Illumination produces shadow free viewing. The patented Welch Allyn Coaxial Vision System facilitates ophthalmoscopy by enabling easier entry into the eye, a larger field of view, and reduced glare compared to standard ophthalmoscopes. *** Manufacture Direct, Ships In 3 5 Business Days *** Sealed optics provide better dust