Velleman VM121 - Manual (Page 6)

6
To access channel 1..8 :
Press button for channel 1..8.
Holding the button will result in continuous transmission, led will flash indicating transmission.
To access channel 9..15 :
Briefly press 'shift'. Led will light indicating that 'shift' has been pressed.
Press button 1..8 to access channel 9..15
Holding the button will result in continuous transmission.
If no button is pressed after 'shift' has been pressed, the 'shift'-led will turn off in about 10s, hereby cancelling the 'shift'-
selection.
Pressing 'shift' repeatedly toggles between shift-on and shift-off
.
Use
USE