Sony Ericsson Home Audio System for Sony Ericsson Z710i, K790a, W300i, Z520a, Z525a, K510a, W810i, W600, W800 Compatible with Sony Ericsson W710i/Z710i/K790a/W300i/Z520a/Z525a/K510a/W810i/W600/W800 Amplifier and L/R speakers with outstanding sound quality Multi AC adaptor with subwoofer Charging your cell phone battery Surround Mode by Digital signal processor (DSP)