Cool Knight Bicycle Hot Wheels 36 LED Flash Tyre Wheel Valve Cap Light for Bicycle Bicycle Decoration Wheel Light Tire Light Double article lamp design, speed is 15 km/hours can show a complete pattern.Other single article lamp is the speed of 30 km/hours Product length 44 cm, is the longest hot wheels on the market at present, design covers all round, two sides Super-long standby, use high brightness, low-power leds, ordinary 7 number batteries, continuous use of more than 20 hours, using an hour every day, can use continuously a month or so DIY programming function, can edit text, letters, any import images, and can be set up any number of display design