PEAK Multi-Color LED Light Up Shoes USB Charging Little Kid/Big Kid Synthetic Rubber sole The brand spokesmen of "PEAK" are Tony Parker and Dwight Howard ,the famous basketball players of the NBA. Using Instruction:There is a switch on the outside of the shoe close to where the usb connection is. So you have a chose one of 7 color for lights along with turning them completely off. Do not wear this shoes when you do strenuous exercise lest damaging the Led light and electronic cables. Charging Instruction: Slowly plug in and pull the Usb line while charging. The led shoes can be used 7 to 9 hours when charging 2 to 3 hours. Do not exceed 3 hours charging time lest the led light is broken. Size: Please measure your foot length and choose size according to the size chart. Shipment: It needs about 10-20 days to arrive to your address normally if they are shipped from China.