. Made of TPE environment friendly material. . . 16pcs four color led. . Flash programed pattern and words or simple picture with size bellow 128*16pixl by PC with the software in CD we supplied , total 30 pictures or words can be saved in light in one time and flash in night one by . Specail fixed position function can ensure the flash pattern or words showed in a certain place no swing while easy to identify. .[...]