1.Time/watt/cost display, time/cumulative power display.2.Time/voltage/frequency display, time/current/power factor display.3.Time/minimum power display, time/maximum power display.4.Time/price display, overload display.5.Easily measure the power consumption and cost of electrical appliances.6.Fine workmanship and stable performance.7.Easy to use.8.Light weight.9.long lasting.