The Welch Allyn Disposable Sigmoidoscope may be used in conjunction with either a 6 V illumination system or traditional Welch Allyn 3.5 V power handles.
Features:
Highly visible graduations for greater accuracy and control
Glare-free frosted coating ensures maximum light output at distal tip
Water-activated lubricating gel to facilitate easy insertion
Individually wrapped for safety and convenience
Fibre-optic illumination system provides a cool 360 degree ring of light
Hinged window with neoprene seal to avoid fogging during insufflation
For more detail: https://www.welchallyn.com/en/products/categories/physical-exam/endoscopic-exam/sigmoidoscopes/disposable-sigmoidoscopes.html