Charcoal Chalk. Quick view Google Nest Mini Smart Speaker (2nd Gen) IN STOCK at GeeWiz Price R945 Charcoal Chalk. Far-Field Voice Recognition Technology Multi-User Capability Dual-Band Wi-Fi Connectivity Wireless Audio Streaming via Wi-Fi 1x 1.58" Driver for 360° Sound Works with the Google Assistant Compact Design at 3.86" Wide, 1.65" High