Sandeul 산들 is the main vocal of B1A4.
Sandeul was born Lee Junghwan 이정환 on Friday, March 20, 1992 in Busan.
Like fellow member Baro, he was born in the Chinese Year of the Monkey. He's a Pisces. At a height of 175 cm or 5'9", Sandeul is B1A4's shortest member. He's shorter than the tallest member, CNU, by 7 cm. Sandeul, CNU, Jinyoung, and Gongchan all share the blood type A.
He studied at Myongji University, where he majored in music. He has an older sister.
Sandeul was a trainee for at least 2 years. He was the fourth member of B1A4 to be recruited. Growing up, he entered and won several vocal competitions around South Korea.
In October of 2016, Sandeul debuted as a solo artist with Come As You Are.
One of his favorite songs is "Road" by g.o.d. Some of his favorite singers are Kim Yeonwoo, Eric Benet, and Park Hyoshin.
Sandeul plays the piano. He likes to swim and to cook. He also likes anime, photography, and history. He's known for his cute eye smiles.
The “gentle breeze dance” part of the “OK” choreography was based on his name.
He’s afraid of knives and has no plans for plastic surgery. He has stated that knowing the importance of your “God-given body” is the start to doing good deeds for your parents.
Before debut, Sandeul switched to contact lenses from his strong prescription glasses.
At one point, his laptop background picture was a picture of Gongchan.