... operationFor analog audio operation, BTA-BC5ME02-1 module offers 2-channel differential audio I/O ports for enhanced stereo application ... functions such as driving LCD, keyboard, and EEPROMFeatures:Highly integrated BT 2.1 + EDR module, CSR BC05-MM-EXT + PA + Balun + ... + X’Tal. + PCB antennaWireless communications module conforming to Bluetooth version 2.1 + EDR, class I. UART, USB, PCM, and I2S ...