REMOTE CONTROL TURN LIGHT: Easy to install. Lightweight and durable bike tail light that can be mounted on all bikes, children's bike, adult bicycle. It also can be used as helmet lights, backpack lights, warning lights and more SET YOUR OWN LIGHT MODES: 5 light mode options: turn right, turn left, red steady, red-blue flash, all light flash. You can switch different modes according to your needs and different occasions to get the best lighting experience and protect yourself USB RECHARGEABLE & CR2032: The turn light is USB rechargeable, and the RED indicator light will turn to GREEN after fully charged. Charging for 1-2 hours can use for 4-6 hours. The remote control can replace the CR2032 battery easily WATERPROOF BICYCLE TAIL LIGHT: The taillight is made of water resistant material to ensure a safe use in raining days. TRY TO GET YOURS WARRANTY FROM WASAGA: Any problem can contact with us, and we will try to solve it within 24 hours. We promise money back guarantee.