ITEM NAME:Bicycle Turn Signal Brake Light Bike Warning Taillight with Electronic Horn Product Description Description: Multifunctional Bicycle Turn Signal Light Bike Rear Lamp Warning Brake Taillights with 8 Sound Electronic Horn Cycling Riding Equipment Feature: 1. Tone adjustment knob: Turn to adjust the tone of the horn; 2. The tail light has a turn signal mode, which can remind people around you; 3. Multi-function: with horn, brake light, tail light, turn signal in one. Specification: Main material: ABS Color: Black Packing size: about 140x89x60mm/5.51x3.5x2.36in Product gross weight: about 220g Application: Bicycles with handlebar diameter within 25.4mm/1in, and seat tube diameter within 27.2mm/1.07in Battery used: 2 X AA batteries (not included) Description: 1. Push it by hand when installing the battery; 2. The controller is installed on the handle, and the steering brake tail light is installed on the seat tube. The brake light control button is installed on the front or rear brake cable (press the control button when braking, the brake light will light up). The length of rear taillight cable is about 135cm/53.15in. Please do not use rechargeable batteries, it is recommended to use ordinary non-rechargeable batteries. 3. Don't install the reverse when installing the battery, or break the wires inside; 4. When installing the brake switch, please adjust the distance to prevent the brake switch from breaking because the distance is too short. Please install it, test it, and then go on the road normally. Note: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 2. Please allow 1-3cm measuring deviation due to manual measurement. Included: 1set X Bicycle Turn Signal Light.The length of rear taillight cable is about 135cm/53.15in. Multi-function: with horn, brake light, tail light, turn signal in one. The tail light has a turn signal mode, which can remind people around you;.