How to switch indoor/outdoor temperature display on my Philips clock?

1) On the back of the main unit, press DISPLAY button. 2) Rotate the knob to select a temperature display mode: * Display indoor temperature. * Display outdoor temperature. * Display indoor and outdoor temperature alternatively. 3) Press the knob to confirm. Note: If the main unit fails to receive signal from the sensor (or if the sensor does not send signal to the main unit), only the indoor temperature can be displayed.