MY-BT401 is a low energy Bluetooth module that supports Bluetooth 5.1 and profiles such as HID, GATT, ATT, HID, and GAP. The module can be controlled using UART communication and AT commands for setting module name, baud rate, and other parameters. The default firmware supports BLE Master-Slave and HID slave modes.

With a working range of up to 80m, MY-BT401 is suitable for use in various Bluetooth low energy devices such as digital keys, OBD, smart homes, IoT BLE sensor networks, and HID remote controls.