ADC Adstation 5610 3.5V Wall Otoscope/Ophthalmoscope Diagnostic SetADC Adstation 5610 3. 5V Wall Otoscope Ophthalmoscope Diagnostic Set includes an ADC Diagnostix 5420 3. 5V Otoscope Head, an ADC Diagnostix 5440 3. 5V Coax Ophthalmoscope Head, a power supply base unit that includes a power switch, two 3. 5V handles, and an extension module. The wall transformer is available with a standard 120V or a 230V power supply with European plug in, and is easy to install with the included bracket or it may be mounted to ADC