The switches used in Logitech Silent Mice are made of a rubber actuator that dampens both the vibration and the sound. A red plastic cap covers the rubber actuator to improve the switch's tactile feedback and lengthen its lifespan.
Lighting
A major reduction in the cost of lighting occurred with the discovery of whale oil. The use of whale oil declined after Abraham Gesner, a Canadian geologist, first refined kerosene in the 1840s, allowing brighter light to be produced at substantially lower cost.
Boss System
Computer Mouse with Usb Led Silent,...
29,00 $
AMD Process
Waterproof, Portable & Durable Bluetooth...
Waterproof means that the device is not adversely affected by contact with water and can withstand water contact without becoming damaged.
35,00 $