ENT Diagnostic Set WG-I 56x34x32cm3/ctn, 20pcs/ctn, 17.5/16kgs Purpose: ENT diagnostic set is designed for doctor's medical check eyes,ears,nose, ... and even lighting,which highly improves diagnostic function.Aesthetic and endurable battery handle is equipped also.WG-I,II,IIB,Diopter compensation: ±1 ... /0.3A) Power Supply:1.5V x 2 "C"Type ENT Diagnostic Set WG-I