The BTA-2 is a Bluetooth transmitter/receiver that enables you to wirelessly connect your phone to your PodTrak P4 or PodTrak P8 to record remote interviews. Once connected, you can use any app such as Skype, Zoom, Phone, and many others to bring in remote guests to interview for your podcast. The BTA-2 has 2 connectors, a 3.5 mm TRRS connector for audio signal on the right, along with a 2.5 mm TRRS power supply connector on the left. The simple setup will have you recording in no time.