FUTABA 12K Instruction Manual page 96

The T12K includes an audible alarm that sounds
when the transmitter's battery voltage drops below
a pre-determined setting; adjustable for cell types
and voltages.
Mixing warning at power ON can be reset to
OFF.
RTN
HOME/EXIT
RETURN
Accessing and Activating the Low Battery
Alarm
5-Cell NiCd or NiMH: 5.6V
2-Cell LiFe: 6.0V
*About low battery voltage, all the models included in one
transmitter are changed in common. It cannot set to different
voltage for every model. Moreover, data reset is not carried
out.
<Functions of Linkage Menu>
96
S1
If the following types are selected, the transmitter will
vibrate during the warning.
*The display blinks.
<Push Dial>
"Vibes" type
TYPE 1
TYPE 2
TYPE 3
TYPE 4