Saves Money Prevents attic lights from being turned on. Prevents basement freezer from being turned off. Practical and cost-effective. Simple push-button operation gives you control of your switches. Easy to read face plate. Attractive and functional. Perfect visual that prevents children from operating switches. Matching color installation screws provided. Computers, answering machines, clock and fax machines. Switches also control furnaces, photocell lights, attic fans, garbage disposals and timed devices such as instant coffee makers. It is inconvenient to reset and reprogram these devices when someone has accidentally shut the switch off. It happens everyday! Instead of placing unsightly tape and notes on the switch, just install the e-Lock Switch Guard. The e-Lock Switch Guard attaches to the existing switch plate with the matching color screws provided. Simply push the button on the device to move the switch to the 'on' or 'off' position. The e-Lock Switch Guard automatically locks the switch when the range of motion is complete. It is easy to install and easy-to-use. With this device, you no longer have to worry about accidentally shutting off a switch and cutting off power to home and office devices (i.e. oil burners, computers, sump pumps, etc.) Easy to install, easy to use.