Couple induction pen is actually a smart gel pen. This gel pen is a pair of two. When the two pens approach each other, the pen will sense each other, and it will immediately light up the "action" and then pass it to the other gel pen matched with it. Yes, this kind of smart gel pen for couples is to let your partner feel your touch at any time in this unique way. You can express the missing of "I miss you" and the sweet love of "I love you" at any time.