Red etap electronic aero groupset because its a bicycle its supposed to be simple to make something elegant to the point where it removes whats in the way thats advancement that is the standard we held ourselves to while developing our first electronic shifting system sram red etap all the electronic components packaged in one box includes 650mm blips x4 blip box rear derailleur and battery front derailleur and battery charger and cord usb stick and quick start guide