The accessories for the Kärcher RCV 5 usually need to be purchased additionally to optimise the functions of the device and extend its service life. The accessory set contains spare parts such as the main brush, mop cloth, side brush and filter, which can be easily replaced.
Yes, to fully utilise the robot hoover, especially the app control, you need a Wi-Fi connection. Without Wi-Fi, you can start the robot manually, but the full functionality of the app, such as controlling it on the move or customising cleaning schedules, is only possible with Wi-Fi.