The DLNA Certification and Logo Program is designed to ensure that DLNA Certified products have implemented the features necessary to comply with the DLNA Guidelines, and that they will in fact interoperate with other similar devices when connected to those devices in a consumer's home environment. The DLNA Certification and Logo Program enables companies to certify their products through a well-defined and rigorous process. Y LG LAB550W, 2.1 channels, 200 W, Wireless, 100 W, Black, 100-240 V LG LAB550W. Audio output channels: 2.1 channels, RMS rated power: 200 W. Subwoofer connectivity: Wireless, Subwoofer RMS power: 100 W. Product colour: Black. AC input voltage: 100-240 V, AC input frequency: 50 - 60 Hz. Subwoofer weight: 3.3 kg, Main unit dimensions (WxDxH): 700 x 350 x 73 mm