Bluetooth Transmission: Stable and high-quality wireless connection. Suitable for Kids: Designed for children over 4 years old. Foldable Design: The foldable design makes it easy to store the headphones. Limited Volume: The volume is limited to 85 dB to ensure a safe level for children. Built-in microphone: Allows you to make calls and record voices. Connectivity: Ability to connect to devices such as mobile phones and tablets. Additional stickers: Includes additional stickers to customize the appearance of the headphones. Eco-friendly materials: Made with eco-friendly materials to ensure the safety of children.