With just a small simple idea, CEO Hyunchul Choi developed Sgnl after winning 1st place during Samsung's C-LAB competition in 2014. He stated, "A colleague was boasting about his smart watch, but was embarrassed by the fact that everyone around him could hear the conversation. As the number of smart watch users increases, they will all face the same problem." From there, CEO Choi began to wonder if there was a way to solve this and came up with the idea of using one's finger to transmit sound. He immediately proposed the idea to Samsung's internal corporate venture department and thus Sgnl was born.
In medicine , a finger tip unit ( FTU ) is defined as the amount of ointment , cream or other semi-solid dosage form expressed from a tube with a 5mm diameter nozzle, applied from the distal skin-crease to the tip of the index finger of an adult.   The "distal skin-crease" is the skin crease over the joint nearest the end of the finger. One FTU is enough to treat an area of skin twice the size of the flat of an adult's hand with the fingers together, . a “handprint”. Two FTUs are approximately equivalent to 1g of topical steroid .