Prepare to be amazed by how well this otoscope works - some say as well as many professional otoscopes. Same magnification and focal length as the Welch Allyn so what you see is just as clear if not clearer due to the very bright led light. - LED light contains no fragile filament like incandescent bulbs. We tried making this bulb go out and could not do it. This included dropping the otoscope from a second floor window on to the ground. It lit right up brighter than ever. Bottom line: If you are looking for an otoscope for home use this is great value for the money. Includes 3 sizes of reusable specula for Adult, Child and Infant. Very nice size and packs easily into Mum's purse or overnight bag for travel. Do not leave home without it. Why we love this otoscope: 1. Works well with Disposable Specula (available separately from us). 2. The LED light source contains no fragile filament and is impervious to shock or trauma. 3. No hunting all over for bulbs for an off brand otoscope you bought several years before from a fly by night seller. If you don't find a matching bulb your otoscope is useless from that point on. 4. No price gouging to buy a bulb from the large well known brand that will cost more than this entire otoscope. A bulb that will need replaced on a regular basis and even sooner if the otoscope is ever dropped or handled rough in any way. 5. Same magnification and focal length as the Welch Allyn so what you see is just as clear if not clearer due to the very bright led light 6. Very informative weblink with high resolution photos of both normal and diseased eardrums and detailed use instructions written by a qualified doctor.