The "▼" button on the lcd display is used to set channel 1, 2, 3 and the cyclic channel(displaying the symbol of a circular arrow in the upper left corner of the channel number), which means that the weather station can connect up to 3 wireless outdoor sensor. You need to press the "▼" button to switch the different channels on lcd display corresponding outdoor sensor channel(press the channels switch). Channel 1 only corresponds to channel 1, and the same channel 2 and channel 3.
If the cyclic channel is switched on, the indoor lcd screen will automatically display the temperature and humidity of the total 3 channels in turn. Otherwise you need to manually press the "▼" button to be informed of the data for each channel. If only one outdoor sensor was connected, the channel's automatic cyclic function will be unavailable.
The "TX" button is used to transmit signals for connecting outdoor sensors and indoor sensor. It automatically transmits the signal every minute. If there is no data displayed on the lcd screen, you can manually press this button to re-transmit the signal.
When both of the indoor sensor and the outdoor sensor are powered on and the signal is successfully transmitted, it is preferably left them to stand for 3 hours. At this time, the signal and the data are the most stable and accurate.
Type applicable: The sensor is suitable for Kalawen weather clock 3383/388/3390, NOT PT201.

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