Roborock S4 Manual Del Usuario página 8

Safety Information
Make sure the product is powered off before shipment.
Use of the original packaging is advised.
If to be left unused for a long period of time, fully charge the product and switch
it off before storing it in a cool, dry place.
Charge it at least every three months to avoid over discharging the battery.
To satisfy RF exposure requirements, a separation distance of 20 cm or more
should be maintained between this device and persons during device operation.
To ensure compliance, operations at closer than this distance is not recommended.
The antenna used for this transmitter must not be co-located in conjunction with
any other antenna or transmitter.
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