Johnson ICEBERGCP Guide D'utilisation page 131

Warning and troubleshooting
for networking failures
When the product is connected to the network, please make
sure that the phone is as close as possible to the product.
We only support 2.4GHz band routers at present.
Special characters (punctuation, spaces, etc.) are not
recommended as part of the WLAN name.
It is recommended that you connect no more than 10
devices to a single router lest home appliances are
affected by weak or unstable network signal.
If the password of the router or WLAN is changed, clear
all settings and reset the appliance.
The contents of APP might change in version updates
and actual operation shall prevail.
Wi-Fi information
Wi-Fi transmit frequency range: 2.400 2.4835
GHz EIRP not more than 20dbm
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V.1