Smart sound sends data over sound that cannot be heard by humans, enabling connection among devices without additional hardware. Mobidoo is leading Fintech industry with its own technology 'Smart sound'. 'Smart Sound' is applied to payment, IoT, and marketing solutions, and has been customized to Lotte L.pay and commercialized for more than 20,000 merchants of Lotte Department Store, Lotte Mart and 7 Eleven Korea, etc. as the world's first case. Currently, mobidoo is launching pre-paid P2P payment platform for merchants and users. Mobidoo is targeting fintech and global market using 'Smart Sound' technology.