 Your audio processor only has an on-off switch. All other functions can be controlled with the fine tuner remote. To turn up the volume with the fine tuner, press the volume plus key. To turn the volume down, press the volume minus key. To increase the sensitivity of your audio processor's microphone, press the upper sensitivity key. This will increase the range of the microphone, but may also increase levels of background noise. To decrease the sensitivity of your audio processor's microphone, press the lower sensitivity key. The default key sets volume and sensitivity back to predefined values set by your audiologist. Pressing default will not change your program. To select a program, press one of the four keys marked with white dots. To turn on your telecoil function for connecting to assistive listening devices, press the T key. This provides sound input only through the telecoil and blocks sounds from the microphone. To select a combination of telecoil and microphone input, press the MT key. To return to microphone-only input, press the M key. Your processor automatically returns to microphone-only input when the processor is turned off and back on. For bilateral recipients, the left arrow selects only the left processor for control. The right arrow selects only the right processor. The double arrow selects both processors for control. If you press any key and see the red indicator light on your fine tuner flashing three times, the battery of your fine tuner needs to be replaced. Your audiologist can selectively disable any of the functions on the fine tuner remote. The fine tuner features an optional automatic keyboard lock to avoid unintentional operation. This locks the keyboard if no key is pressed for more than 10 seconds. To activate the keyboard lock feature of your fine tuner, hold down the double arrow key for more than 5 seconds to enter the program mode. The red and both amber indicator lights on your fine tuner will start blinking alternately, indicating that you have successfully entered the fine tuner's program mode. Then hold down the right arrow key to activate the automatic keyboard lock. The fine tuner will confirm successful activation of the automatic keyboard lock by a short blinking signal of the two amber indicator lights. To use the fine tuner while the keyboard lock is active, press any desired key twice. The first press temporarily unlocks the keyboard, and the second press executes the command. After 10 seconds without pressing another key, the keyboard is locked again. To deactivate the automatic keyboard lock, press the double arrow key twice to unlock the keyboard. Then hold it down for more than 5 seconds to enter the program mode. Press the left arrow key to deactivate the keyboard lock. The fine tuner will confirm successful deactivation of the automatic keyboard lock with a short blinking signal of the two amber indicator lights.