ophthalmoscope: 1. D/C power, working with 2 AA 1.5v batteries 2. CE quality, low price 3. aluminum case package direct ophthalmoscope professional ophthalmoscope #8C:1.high quality with CE certification.2.working with 2 AA 1.5v batteries3. professional tech, and low prices4. fast delivery time5. safe and nice package ophthalmoscope heads can be supplied too.