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BETA 200 Ophthalmoscope + BETA4 USB rechargeable handle with USB cord and plug-in power supply, 2,5V, hard case
• positive lenses range from +1 to +10D in steps 1 than +15 +20 +40D
• negative range lenses from -1 to -10D in steps 1 than -15 -20 -25 -35D