AlphaBAT (알파벳) is a South Korean pop/hip-hop boy group under Simtong Entertainment. The group consists of 9 members: B:eta (Leader), C:ode, D:elta, E:psilon, F:ie, G:amma, H:eta, I:ota and J:eta. They made their debut on November 11, 2013 with digital single "AB City". AlphaBAT made their debut as hip hop duo consisting of Selin and Kyumin in December 2012 under YUB Record with "Hello". However, around January 2013, the duo group changed to a 9 member idol group.