FCC ID :DY7RT8059
14
(13) Key Lock
1. Turning on and turning off the key Lock function change every time the CLR key
and the DWN key are pushed at the same time.
Note:
Key Lock function may be activated in all modes.
(14) Screen and Keypad Lighting
1. The screen and the keypad lighting of SP-400 work for five seconds when each key
operation and each button is operated.
2. Press and hold the LIGHT button for one second to activate and leave on the
screen and keypad lighting.
3. Press the LIGHT button a second time to turn off the screen and keypad lighting.