Stereo pc speaker 21 pc speaker system thx multimedia certification suitable for all computergames consoletvmp3 with 35mm or rca output series logitech z colour black transmission mode cable analogue inputs 2x 35mm jack input line in stereo rca input analogue outputs 35mm phone jack power rating 200 watt effective output 400 watt frequency response 35 20000 hz speaker system 21 system sound system thx system active power supply mains connect