Self-service technologies have developed as helpful tools in our everyday lives while constantly being adapted to meet new challenges and requirements in today's world. This study explores the factors influencing usage intentions towards a selfservice kiosk with biometric authentication in a retail context. A quantitative study with 28 participants was conducted in a laboratory environment. Participants were asked to purchase a SIM card at a self-service kiosk. The findings revealed that convenience and relative advantage had a strong impact on usage intention. In contrast, functionality and security concerns towards biometric authentication showed no significant effects. In addition, the results indicate that usage intention affected positive word of mouth. Further analysis revealed that usage intention mediated the relationship between the significant influence factors (i.e., convenience, relative advantage) and word of mouth.