Features: 1) This device has good effect to three-phase lamps and lanterns. JSD single- phase is suited to middle and small scale enterprises especially some complicated equipment with heavy load 2) Usage: try to install it in front of electrical equipment and at the back of ammeter. As engineering products have been installed in the box, it is very convenient to install. After installing, all the indicator lights are bright, and J.S.D single-phase begins to have effect on electricity-saving 3) Work load: each J.S.D single-phase electronic power saving engineering contains six sets of single-phase electronic electricity-saving devices. Its work load is 36kW, single-phase, 50-60Hz, 110-240V 4) Life span: six to eight years 5) Remark: the effect is distinct after a month, the longer time you use it, the more electricity you will save. Consider installing several devices jointly if the load is heavy 6) The number of engineering that have to be installed equals to the total load of electricity/36kW 7) We also have our own appearance design patent