Stereo pc speaker wireless pc speaker 21 pc speaker system transmitter with range up to 100m speakers power supplied from 9v 12a power adapter or 6 x aa batteries series auna wireless speaker system 21 system system active power supplies batteries mains connection suitable for desktop pc game console blu ray player audio system notebook dimensions w x h x d 20 5 x 15 x 15 cm front dimensions 35 x 12 x 12 cm weight 12 kg