MAXXON wireless brake light Employs similar-to NINTEDO Wii technology world-first wireless brake light bikes Innovative award winner with U.S. patent (US7649447B2) Equipped with PWM/SWITCHING tech, able to work with rechargeable batteries without sacrifice of brightness, environmental ! Equipped with auto-on (within 30 sec of riding, on to Mode-3) and auto-off (when bike is still over 4mins) user-friendly functions World-strictest Germen standard approved with supreme brightness and 250-degree wide beam angles