Enhanced XHL Xenon Halogen Technology.106 bulb used.5 different apertures.Range of lenses: -20D to +20D Otoscope: With and high brightness optical fiber feature, this upgraded fiber otoscope uses LED white energy-saving light bulbs which has endurable performance. A pair of 5 alkaline batteries is needed to work.The product is equipped with large, medium and small aperture horn respectively, making it,possible to check the situation of adults, children and a baby's ear. Ophthalmoscope: This optic ophthalmoscope which is small and delicate, uses a pair 5 alkaline batteries(notincluded). With gift box package, this item has five different apertures, which can meet the doctors'needs for different checking. Lighting system: 1. Illumination: direct illumination 2. Luninace: 18.5 Lumen 3. Bulb: Specified model: &106, 2.5V, 0.7A, 4.8m Dia. 4. Batteries: 2 AA alkaline batteries (Not Included) Size: 16.7 x 4.8cm Material: plastic color: black Light color: white light Otoscope /Ophthalmoscope: Fiber Optic / Direct llumination Spare bulbs: not included Package Contents: 1 x otoscope 1 x ophthalmoscope 8 x earmuffs Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.