This is the shimano alfine s705 di2 shifter switch for flat handlebars right provides easy access to shifting alfine is a stylish premium level component group sure to appeal to quality minded consumers premium quality style versatility and effortless operation define alfine use the clean look and wide range gearing of this internal 8 speed hub to enhance your bicycle brand this shifter is for use with shimanos electronic shifting system di2 only for use with the internal hub gears