BT-410 dongle converts two interfaces: USB 2.0 interface and Bluetooth 4.0 Low Energy interface (master function). That is, if you connect BT-410 dongle to the PC, it can be paired with BT-410 Slave module to exchange data (1:1 communication).
BT-410 is a device that enables serial communication (UART) via Bluetooth communication.
BT-410 covers the circuit with a case to protect it, and it uses a connector-type cable to install on a robot and RC-100B.
You can control your robot without any problems even when the infrared control condition is not optimal such as in a robot competition.
The SLAVE module can be used when controlling the robot from a smart device that supports BLE (Bluetooth 4.0 Low Energy) communication.