The Vemo Rain Sensor - V10721601 is a device that detects the presence of rain and automatically activates windshield wipers on a vehicle. This sensor is designed to improve visibility and safety while driving in wet weather conditions. It is compatible with various makes and models of cars and can be easily installed on the windshield. The Vemo Rain Sensor is a reliable and convenient solution for drivers who want to ensure clear visibility during rain showers.