A labeler is a device used to automatically apply labels to product containers. The design principle is based on precise label positioning and application. The machine uses a conveyor belt to move containers to the labeling position, where the label head removes labels from a roll and applies them to the container. During operation, sensors detect the position of the containers and automatically adjust the label application to ensure even placement. Labelers come in various types, including automatic, round bottle, square bottle, and dual-label labelers. Automatic labelers handle containers of various shapes and sizes, while dual-label labelers can apply two labels simultaneously. Labelers are widely used in industries such as food, beverage, pharmaceuticals, and cosmetics, enhancing production line efficiency and label application accuracy, making them suitable for large-scale production and packaging processes