Introducing the amiibolink Bluetooth keychain a compact and convenient device designed for seamless connectivity. This lightweight accessory supports quick and reliable data transmission through smart sensing technology. It features Bluetooth connectivity and offers customizable mode settings via a dedicated app.Advantages: The device features a simple one-button operation for ease of use. Its compact size and lightweight design make it portable and suitable for everyday use. Smart sensing technology ensures responsive performance.Traditional Card Disadvantages: Compared to traditional cards, this device eliminates concerns related to portability, limited storage, and single data storage per card. It allows quick switching between data files without the need for physical card replacements.Mode Settings: To set the mode, open the app and navigate to profile -> settings -> mode settings. Random mode: Pressing the button generates new data based on the current bin file, simulating a new card. Sequential mode (file switching mode): Pressing the button cycles through stored bin files, with support for up to four offline files. Firmware upgrade mode: Press and hold the button until the green light stays solid, entering firmware upgrade mode. Download the update package and use the app to complete the upgrade.