puipuina YGH667 Muliti-function Electronic Pedometer Measures the steps you have taken and your walking distance. Discover how many calories you are burning while you walk Features include large display, clock, detachable belt holder Small and light so it is easy for adults and kids to carry. Simply clip it on your garment, put it in your purse or bag, and start walking. Power source:DC 1.5V(AG-10 *1PC)