With the progress of science technologiecan audio product is getting more and more,in is too inconvenient if these products cobinde together,many sockets will be installed for them.Time Series Instrument is availablt to turn on/off the electric equments connected according to the orders by the mode form first to last one when turning on,and from last ont to the first when turning off to avoid some damage of the terminal instruments(eg.Amplifiere or speakers…etc) because of the incorrect operation and also reduct the rushing electrical current which is caused to the lines of the power transmission when theelectrical instrutmnts turning on.As the function of this instunent,some managers of the system can never touch the ON/OFF switcf of the power.It is an essential instrument for an audio system,a computer,net system of television and broadcasting and other electricity engineering