User manual LOGITECH MX 5500 REVOLUTION

[. . . ] English Plug the USB mini-receiver into your computer's USB port. [. . . ] Keyboard LCD -- Time and date: either AM/PM or 24-hour format is displayed, depending upon the software installation language that was selected. Keyboard LCD -- Shows your Favorites keys assignments (folder, web sites, or applications). Keyboard LCD -- Key counter: maintains a running count of all keystrokes; change batteries one by one to keep count. This optical device complies with International Standard IEC 60825-1: 2001-08, Class 1 Laser Product, and also complies with 21 CFR 1040. 50, dated July 26, 2001: 1) Emission of a parallel beam of infrared user-invisible light; 2) Maximum power of 716 microwatts CW, wavelength range 832 -- 865 nanometers; 3) Operating temperature between 5°C (41°F) to 40°C (104° F). Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. 2) In the absence of proper operation and if customer-initiated troubleshooting is unsuccessful, switch off device and call Logitech" technical support. 3) Do not disassemble your product or expose it to liquid, humidity, moisture, or temperatures outside the specified operating range of 5°C (41°F) to 40°C (104° F). [. . . ] Logitech assumes no responsibility for any errors that may appear in this manual. [. . . ]