Jaehan is a South Korean singer-songwriter under IPQ. He is the leader of the boy group OMEGA X. He is also a former member of the boy group SPECTRUM and the duo OneVoices under the name J.Han.He released his first solo single “Jaehan Watch” on December 18, 2018.In 2017, Jaehan was a contestant on Produce 101 Season 2, representing MMO Entertainment, but was eliminated in episode 4, ending with a final rank of #81.2017–2020: SPECTRUM and solo debutJaehan was originally expected to debut in SPECTRUM in October 2017, however, the group’s debut was postponed due to the member’s participation in MIXNINE.On May 9, 2018, SPECTRUM released their first mini album Be Born on May 9, 2018 and Jaehan officially debuted on May 10 through their debut stage on M Countdown.