Stereo pc speaker 21 pc speaker system series gembird spk colour black transmission mode cable analogue input 35mm jack input line in power rating 17 watt effective output 340 watt frequency response 50 20000 hz speaker system 21 system system active power supply usb suitable for desktop pc game console blu ray player audio system notebook speaker controls corded remote dimensions w x h x d 7 8 x 13 8 x 7 8 cm subwoofer dimensions 158 x 1