3.5 V Diagnostic Desk Set with 2 x Li-Ion Handle, Autostep Ophthalmoscope, Retinoscope and Universal Desk Charger, UK PlugDesk Unit Charger with 2 x Lithum Ion rechargeable handles in a charger Two Lithium handles in charger offer a lightweight, longer lasting on time alternative to NICAD handles with no memory effect Unique 3. 5v coaxial ophthalmoscope head allows easy entry to the eye and shadow free viewing of the retina 6 diagnostic beams: Small, Medium & Large Spot, Target, Slit and Cobalt Blue Red free, and polarising filters Dioptre range: +40 to 25 Double sealed,