The Smarttrig BT is a dual Bluetooth transceiver module developed by Pointguard with multiple triggers and RS232 serial interface. As a Bluetooth module it is the link between mobile devices (such as tablets and mobile phones) and hardware with serial communication, such as digital roof lights, taximeters, printers etc. The Smarttrig BT can also be used as a trigger, that reads state changes on up to 5 inputs and then sends different serial commands over Bluetooth, RS232, or both based on these inputs.