Kasstino Bicycle 11LED Signal Turning Brake Rear Tail Light Horn Bell Bike Indicator Lamp Left / right directional control switches. 7 super bright LED (Left / right: 2 LED, Middle: 3 LED) 8-tune Horn: An integration of the 8-sound horn. Light Model: Turning light, break light, night lamp Powered by two AA batteries( not included) The controller is mounted on the handle, steering brake taillights mounted on the seat tube, brake light controls mounted on the front or rear brake cables(When pressed brake controls, brake lights work) line between the host and the taillights long 230cm around, pay attention to the actual situation of their own purchase of the car, avoid buying cord is too short to work, please note, thank you!