Bag for securely attaching a smartphone to the handlebars of a bicycle or eBike. Optimal usability: A special film allows the touch display to be operated while in the bag. For portrait or landscape orientation: 360° rotatable holder for optimal smartphone alignment. One click: The bag can be removed from the holder with just one button press. The bike phone bag is compatible with smartphones up to 8 cm wide and 16 cm tall. The smartphone bag can be mounted on handlebars with a maximum diameter of 4 cm. 2-in-1 smartphone holder and phone bag: Convenient for optimal protection and usability on the go. Weatherproof: The smartphone is well protected from splashes in the bag made of durable, robust, and dirt-repellent material. A visor shields the sun and improves display readability, ideal when using your phone as a navigation device. Additional compartments for cash, charging cables, power banks, and other on-the-go essentials. Side opening for headphone or USB cables. The phone can be rotated as desired, for example, for horizontal navigation on the smartphone. The bag is attached without gluing or drilling, making it suitable for almost any bicycle and easily removable when needed.