Yes, all Deeper Smart Sonar devices will work wherever you are. They do not require any kind of internet or cell connection in order to be used. However, you will need Internet to install the Deeper application on your smart device (smartphone or tablet).
Please note that some application functions such as Weather forecast, Maps or ice hole marking do require an internet and GPS connection on your phone.
In case you are fishing in an area with no internet connection, you can pre-download offline maps. This way you will be able to fully use the bathymetric mapping features of your Deeper even with areas with no internet connection.