LG NB2540, 2.1 channels, 120 W, Dolby Digital, DTS, 25 W, 70 W, Black LG NB2540. Audio output channels: 2.1 channels, RMS rated power: 120 W, Audio decoders: Dolby Digital, DTS. Soundbar speaker RMS power: 25 W. Subwoofer RMS power: 70 W. Product color: Black, Audio formats supported: LPCM. Connectivity technology: Wired & Wireless