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There are no user serviceable parts inside. Opening these speakers may void your warranty. For technical support please visit SPECIFICATION Total Output Power: RMS 1W > RMS 0.5W Per Channel > 2" Full Range Speaker Driver > Frequency Response: 150Hz~18KHz > Magnetically Shielded > Power Indicator > Dimension: 60(W) x 85(D) x 133(H)mm SPK-S20 User Manual Please read carefully before use Csystem connection^) CONNECTING METHOD 1: Plug the USB cable in a spare USB socket on your compu