... is equipped also.WG-I,II,IIB,Diopter compensation: ±1,±2,±3,±4,±5,±6,±8,±10,±12,±15,±20,- ... 25,-30WG-III,Diopter compensation: ±1,±2,±3,±4,±6,±8,±10,±15,±20,±25,+40WG- ... 12,±16,±20,-25WG-XP,XPB,XPC,Diopter compensation: ±1,±2,±3,±4,±5,±6,±8,±10,±15,±20,±25,+ ... Depressor Plastic9.Battery Handle10.Spare Bulbs(2 Large and 2 Small 2.5v/0.3A) Power Supply:1.5V x 2 "C"Type ENT Diagnostic Set ...