Krisons 2.1 has various input sources like USB ,Fm radio , AUX-in and sd card reader and is compatible with your mobile phone, tablets, PCs, television etc. It comes with 1 sub-woofer and 4 satellite speakers. It has a wireless remote for ease of use. It has a high output and crystal clear natural sound. It is a perfect home entertainment audio system with state of art technology and european design for those who prefer true value, attractive looks and superior performance this is the right choice. Just plug-in and enjoy.