yeah very small. probably like 2 inches in diameter. its located above the large green cap. i hv ordered the yellow leather 3x online in the past, and it arrived dead everytime. this time, it should be better since i got it from a lfs with 30 minute transit time. my lfs normally sells the yellow leather for $40-70. i think its a fair deal bc lfs got to make $$ too. did u see the new tuze nanostream i got today too? its located at the left side. i am going to get the 6055 controllable in a few weeks.