The VocalFusion dev kit for AVS includes the XVF3510 processor board, a dual microphone array daughter board and a Raspberry Pi HAT adapter board. Developers will need an Alexa Developer Account and a Raspberry Pi 3 (to run the AVS SDK and Sensory TrulyHandsfree wake-word engine). The XVF3510 processor board has a micro-USB connector for power and USB connectivity, a Line-in port and an xTAG interface for firmware updates. The Raspberry Pi HAT adaptor board has I²S and I²C control connectivity, 24-bit stereo DAC, Host controlled buttons (mute and volume) and an LED (which will be green when in ‘ready state’ and blue when Alexa is ‘listening’).