Welch Allyn 74910 Opthalmoscope and Otoscope powers up and a red light come on. With transformer unit on, instruments will light automatically when handles are lifted from holder.
Adjust rheostat knob until desired lamp brilliance is obtained. Turning rheostat clockwise increases light, counterclockwise decreases light.
A built-in, automatic voltage regulator provides maximum illumination and lamp life. The instrument's lamp is automatically turned off when handle is replaced on holder. Transformer may be turned off by turning the switch off. Pilot light alone draws current when instruments are not in use. When unit is not in use for more than a few hours, turn switch to off position to insure longer operating life. Unit can be left plugged in permanently.
Welch Allyn 2.5V Ophthalmoscope Head
Halogen light for true tissue color and consistent, long-lasting illumination
Rubber brow rest prevents scratching of eyeglasses
Illuminated lens dial clearly identifies setting
Welch Allyn 2.5V Otoscope Head
Halogen HPX™ lamp produces 30% brighter, whiter light for true tissue color
Open system makes use during procedures more convenient
Rotatable lens and speculum for ease of use
Fiber optic illumination produces cool light
Power input: 120V/60Hz
Power output: 2.5 Volts