The Feasycom FSC-BT2661 supports dual-mode Bluetooth 5.3 (BR/EDR/BLE). By default, FSC-BT2661 module is equipped with powerful and easy-to-use Feasycom firmware. It's easy to use and completely encapsulated. Feasycom firmware enables users to access Bluetooth functionality with simple ASCIl commands delivered to the module over serial interface, just like a Bluetooth modem. Therefore, FSC-BT2661 provides an ideal solution for developers who want to integrate Bluetooth wireless technology into their design.