Boy group B1A4 Sandeul has proved his strength as a next generation vocalist.

In the fourth episode of KBS2's "In sync" aired on 26 night, Lee Hong gi, Moonbyul, Soyou, Choi Jung hoon, Son Tae jin Song So hee and Nam Tae hyun Punch paired up to stage the final contest.

Only male couple Sandeul and Din Din, enthusiastically sang Lee Hi's "Breath." Sandeul quickly focused the audience with his unique appeal, voice and delicate sensibility. The mountains made a scene of emotion by showing off their explosive singing ability. Especially, the atmosphere was even more heightened by his fantastic collaboration with Din Din.

The final ranking was decided by the vote of the audience. The first place in the voting was Sandeul and DinDin. Out of the 100 couples in the 50s, they got for a total of 33 votes. In the final match, Sandeul and Din Din became the only male couple to be chosen by female contestants, but the two made a comeback with an unexpected fantastic chemistry.

The member of the B1A4 Sandeul is focused on individual activities. The eldest member, Shin Woo, joined the military in January this year and is currently serving in the military services.