Features: -Versatile bike gadget -Perfect Size for Most Bicycles with Fashionable Design. -Power System: Solar and Battery (1x CR2032, 3.7V, 240mAh) -3 Control Switch Modes Including Steady, Scrolling Text and Flashing. -Solar Panel Size: 37x22x2.5mm. -Run Time/ Solar System: fully charged condition can be used for 80-90 minutes in scrolling text mode. -Battery System: 50hs @ steady mode, 150hs @scrolling text mode, 100hs @flashing mode. -Unique 180 degree Pantoscopic Design-High visibility and allows users to be seen and safe. -Water Resistant Housing - Easy install the battery without any tools. -Dimension: L53x W75 x H26 (MM) with 41g only. -Made in Taiwan.