Amazon is replacing its "Just Walk Out" technology with "Dash Carts" that let customers scan and bag items while shopping at its Fresh grocery stores in the US. Dash Carts provide benefits like seeing a running total, finding items, and personalized deals while shopping. Computer vision and sensor fusion help the carts identify items placed inside. The "Just Walk Out" system will remain in use at smaller Fresh and Amazon Go stores and will continue to be available for licensing to other retailers.