YPF-03 2-in-1 Bluetooth Audio Transmitter and Receiver with Dual 3.5mm Port Use the YPF-03 2-in-1 Bluetooth 4.2 audio transmitter and receiver to send audio from your 3.5mm device to the Bluetooth device, and vice versa. Convert your home stereo, speakers, wired headphones, and any other 3.5mm device to a Bluetooth device.