Stereo pc speaker 21 pc speaker system series harman kardon soundsticks colour transparent transmission mode cable analogue input 35mm jack input line in power rating 40 watt effective output 65 watt frequency response 44 20000 hz speaker system 21 system system active power supply mains connection power consumption operating 65 watt power consumption idle 4 watt suitable for smartphone mp3 player tv tablet game console desktop pc blu ray