To avoid buying a Dolby Surround Home Cinema and everything !!!!
Requires a few more connections between the screen and an old analog HIFI amplifier but fulfills its role perfectly, almost Plug and Play for a very acceptable result! Considering the price, we are not robbed if you already have an amp with relatively powerful speakers! Do not expect a dolby surround system 7.1 of death, but it already transforms well the original sound of its TV at lower cost !!!!