denuccio7 years ago000how is it possible to benefit from the 4 year guarantee, as shown in the second image of the product?Show in original language (French)Former user7 years ago000How do I fix connections for Bluetooth audio devices and wireless displays in Windows 10? https://fixconnectionsbluetoothaudiodeviceswirelessdisplayswindows10.net We will tell you the tips that you can connect to a Bluetooth device and display wireless with Window 10CommentFabio Endrich7 years ago000You can register your product under the following link: http://marantz.lakesideaudio.chShow in original language (French)Comment