Check the listing for details. Schweizer ergo-Lux I Portable. Color: ., Condition: New. Listed at 195.78 USD. The lifestyle magnifying glass ERGO-Lux i mobile with induction charge. In addition to the tried and tested boost switch Optimization of illumination and 3 light colors Energy supply via induction according to the “QI” standard. No more changing batteries, no more tangled cables, no more 2-stage boost switch to optimize illumination, with acoustic feedback and haptic guidance Lithium polymer battery for 7 hours of operation at level 2 at max. 3 hours charging time. Already 10 minutes. Charging is enough for over 1 hour of lighting time High-contrast and homogeneous light through optimal adjustment of the light intensity 17 magnifying glasses with 11 different magnifications, 3 light colors and 2 illuminance levels All magnifying glasses available as individual magnifying glasses or as.