Interlink wireless mice are available for all technology classrooms that have a PC in the instructor station. These mice enable the user to control the computer from anywhere in the classroom. The left mouse button function is located under the device and is usually activated by the forefinger. The left mouse function can also be activated using the right pointing arrow on the top of the device. The right mouse button function is activated by the left pointing arrow on the top of the device (please don't ask why!). The round button serves as the mouse control. There is a laser pointer as well. Wireless mice operate on different frequencies so that they don't interfere with each other in nearby rooms. To change the setting, press and hold the two arrow buttons until you see the button lights flash (about 15 seconds) then press the desired frequency. Contact the Media Center (83059) to find the frequency for your classroom(s). Batteries may be changed by sliding open the compartment on the bottom of the device. Two AA batteries are used.