Detailed description: 1)the first socket is Master socket, only for computer/ TV 2)3 positions for the Master socket:20-300W/40-300W/60-300W 3)the other 4 sockets are Slave sockets, for other devices, like display,printer,scanner,VCD,light etc 4)Only when there is output for the computer/TV, there will be output for the other devices 5)working voltage: 230V AC/50Hz(120V AC/60Hz) 6)Max.output power for total4 Slave sockets: 2400W (8)we can also provide Germany,British,French,Italy,USA etc Standand for multi-function sockets(USB plug for PC and other multi-function socekts for TV/PC/electric appliances)