FSC-DB006-BT691-USB is a DA14531 BLE Module Testing Board featuring a USB Port, designed specifically for the FSC-BT691 BLE Module. It offers users enhanced convenience and ease of testing compared to using the Bluetooth module alone. The USB Port allows direct connection to a computer, saving time and ensuring stability during testing. When paired with Feasycom’s free UART tool, users can fully control the FSC-BT691 module using AT Commands, facilitating efficient development and testing processes.