Batteries are easy to change as the battery cover is easy to open and contact springs clearly indicate the battery position. Improves comfort due to eyelet for round-the-neck cord. Attachable filters enable you to choose the ideal colour of light to suit your vision requirements from a choice of two colours. The LED light does not require changing. The LED-light used by ESCHENBACH has a service life of approx. 50,000 hours. The battery life is up to 10x longer in comparison to a conventional light. The voltage is controlled via a step-up converter, which produces a brighter light and even illumination over a longer period of time in comparison to other LED illuminated pocket magnifiers which do not have a step-up converter. Bright, even illumination provided by SMD LED and collimation optics. Defined focusing distance: in the case of all aspheric magnifiers and reading magnifiers from ESCHENBACH the focusing distance (aE: distance from the eye to the virtual image) is precisely 400 mm. The image can therefore be seen clearly with readers which have an addition of +2.5 dpt.