Professional diagnostic sets with fiber optic illumination system, Xenon halogen light 3.5 V, rheostat to adjust the intensity of light. Powered by rechargeable Li-ion batteries. All products are made of impact resistant re-inforced plastic and durable easy locking system for hospital long term use. Supplied in deluxe case, should be used with charging station 31542 and Li-ion rechargeable battery (31541). F.O. Xenon ophthalmoscope set 3.5V - F.O. ophthalmoscope head - Battery handle with bayonet lock - In a rigid case