Listening to music or conversations through Bluetooth audio headsets benefits greatly from integrated Ambient Noise Cancellation (ANC). This technology eliminates unwanted background noise from the received audio and at the same time also minimizes disturbances in the transmitted audio stream picked-up. The integration minimizes latency, power consumption and decouples the ANC function from any operating system. An integrated USB battery charger eliminates the need for a dedicated component enabling designs with minimalistic BOMs while offering a maximum in performance.