NO MORE RAISE YOUR ARM TO INDICATE YOUR DIRECTION - With just one thumb, you indicate your direction and are visible up to 100 meters away thanks to the ultra-bright LEDs. In addition, the integrated acoustic signal signals your presence to other road users and pedestrians. Other road users can anticipate your lane changes and hear you from a distance for your own safety; red light always on, red light flashing or all flashing. You can change the different signaling modes according to your needs; SIMPLE USE AND EASY TO INSTALL - Its quick fastener allows you to install the flashing lights and the remote control in less than 30 seconds. adapt to all types of seat post or luggage rack. Only 3 buttons for easy handling and to minimize reaction times. Tap, Flash, Turn; RECHARGEABLE AND WATERPROOF - Built-in large capacity rechargeable battery, charge your rear light with turn signal via USB, quick and easy from your computer or other charging methods. All cables are provided. Ride even in the rain without stress, Our system is water resistant thanks to the certification