Sandeul is a South Korean singer and member of the boy group B1A4, which debuted in 2011 under WM Entertainment. Known for his strong vocal abilities, he has contributed to the group's success with his distinctive voice and engaging performances. Sandeul has also participated in various television programs, showcasing his personality and talent beyond music. In addition to his work with B1A4, Sandeul has pursued a solo career, releasing music that highlights his versatility as an artist. He has been involved in various projects, including soundtracks for dramas, further establishing his presence in the South Korean entertainment industry.