@shaunamarie06: Free shipping!!! Quick Double Tap of the power button will light them up blue, & the blue will tell you how charged they are. 1 blue light means low, 3 means all the way charged. Hold the power button to turn on/off. 3 heat settings shown with red lights: 1 Light, Low. 2 lights, Medium. 3 lights, High. They also come with their own, dual, charging cable.