Brand new and high quality. Super bright. Long service life. Installed on the bicycle handlebar， seat stay， seat post. Look no further， buy it now! Size: 7 x 4 x 3 cm Lamp bead quantity: 4 x Light Emitting Diodes Lighting mode: all flash， slow flash alternately， steady on. Power supply: 2 x CR2032 (included) Package:1 x LED warning light 1 x Fixed mount In original package