The Grove extension board can be stacked (connected) right onto the top of ReSpeaker Mic Array. It brings even more possibilities as you can connect various Grove sensors and actuators to extend ReSpeaker’s capabilities. The board provides up to 10 Grove ports for interfacing with a range of plug-n-play Grove sensors and actuators.Up to 10 Grove PortsStackable with ReSpeaker Core and ReSpeaker Mic ArrayGrove Ports: 10Digital I/Os: 3Analog I/Os: 4I2C Interface: 2UART: 1Dimensions: 70mm (Diameter)Weight: 15.25g 1x Grove Extension BoardGet Started With ReSpeakerWe have well prepared some tutorials to help you getting started with ReSpeaker on Github, please click here to visit.RELATED PRODUCTSReSpeaker CoreReSpeaker Mic Array