SONY SA-D100 is a very exciting music system . and SONY SA-D100 is a 4.1 multimedia speaker . its a new brand of sony campony . and its 100 awtt speakers . and this hometheature system is bluetooth . and this also connet to the TV and aux and mobile and this speakers input USB and this system is a reasonable prise . its new bestet system from comparision to other brands . so I like the SONY SA-D100.