Keeler Bulbs for Practitioner, Vista & Fibre Optic Otoscope 2.8v (Pack of 2)
All Keeler instruments use genuine Halogen and Xenon technology, yielding a brighter, whiter illumination and a longer life. Look at the bottom of your bulb to identify for your instrument. Blue 2.8V (Dry cell battery). Red 3.6V (Rechargeable battery).