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Traditional brick-and-mortar retailers face increasing competitive pressure from online alternatives. One promising technology to help retailers cope with the ongoing retail crisis is mobile self-checkout systems (MSCOS). However, there have been issues with MSCOS implementation. This study aims at gaining a better understanding of consumer needs related to MSCOS. Using diffusion of innovation as its theoretical lens, we explore the impact of relative advantage, trialability, compatibility, and ease of use on MSCOS adoption. Since MSCOS involves financial transactions, we also consider the impact of perceived privacy, accuracy, and security. A crowdsourcing data collection resulted in 302 responses from US respondents. Findings support that relative advantage, trialability, and perceived security positively affect usage intention. Moreover, compatibility and ease of use positively affect relative advantage, and perceived privacy and accuracy positively affect perceived security. This study provides significant insights and implications for both innovation adoption research and retail practice. JEL Codes: O300, O330, M150