Specifications: Screws onto valve stem in seconds,lights automatically when in motion, Shuts off when stationary,flashes 2 times A second,decorating your tires. Avalable in these colors:red,blue,green ,purple,yellow,orange and white. 6 batteries included.Fits all cars,trucks,bikes,scooters etc. Packing details ： Meas:48.5?27.5?20.5cm 120 pcs/ctn ; 116305pcs /20? G.w./N.w.: 6/ 5.16kgs