The DFR0718 audio module from DF Robot is designed for audio input and output applications using Bluetooth 5.0 and BLE technology. The Bluetooth capabilities allow for wireless control, streaming, and communication with an external device or platform. The module supports a 3.7 to 5V DC voltage input, with two audio channels, one LineInput channel, one LineOut channel, and can be integrated with other applications and products. The module is integrated with a built-in audio codec, amplifier, low-noise microphone preamplifier, and PLL synthesizer, and supports multiple protocols. The audio counterparties have full duplex transmission and non-blocking audio outputs. The module is also equipped with a noise filter that reduces background and static noise for better audio quality. This module is designed for applications such as audio streaming, Bluetooth audio transmission, and wireless microphone applications.