About Bluetooth RelaysOur Bluetooth Relay Controllers make it easier than ever to add Bluetooth wireless switching to your most demanding computer or smart phone control applications. Simply pair this controller to your smart phone or computer. The controller mounts as a Virtual COM Port on your PC, allowing easy programming from any language that supports serial communications.Smart Phone and Computer PairingThis Bluetooth Relay will be paired with a Bluetooth connection on your smart phone or computer. Use our free Android Application or write your own to fit your needs using our simple API. Control from your computer by using the Serial Port Profile built into the Bluetooth Communications stack and talk to the board as if it were directly wired to your PC. Compatible with any Operating System and PC that supports Bluetooth Communications with the exception of iOS devices due to limitations of the manufacturer.