Olympus says its model isn't for children under 16 or for people with heart or eye problems. Sony's Glasstron goggles automatically shut off after three hours of continuous use. A charcoal filter neutralizes odors. The device, particularly designed for disabled users, takes some getting used to but has attracted many fans. Most Closomat devotees are in Switzerland where you can buy the units direct from the manufacturer, Closomat AG, of Zollikon.
Distribution is limited mainly because a specially trained plumber is needed to install the device.