ArduSimple AS-XBEE-BT-2.4-INT BLUETOOTH® Module features low-cost RTK technology without the hassle of cables. The ArduSimple AS-XBEE-BT-2.4-INT is designed to integrate with a smartphone or computer and is compatible with all leading Bluetooth modules supporting UART communication. The device pairs with the simpleRTK2B board and can connect to an existing XBee socket.