3.5V PRO LED FIBER OPTIC Otoscope Examination LED Diagnostic ENT SET-BLUE Powered by 2 AA batteries (not included) Clip to attach on clothing making it very portable Light weight Total weight of set: 167g Easy to assemble Made from solid plastic (Impact resistant) Easy on/off switch on handle Powerful light illumination Long lasting & Reusable with the best and most precise results Perfect for house calls and private use