In Korea, the record companies figured out how to make some extra money out of this: instead of lighters or phones, many K-Pop artists and groups have an “official lightstick” with a special design, to be bought by fans as a way to identify themselves as fans of the act. While some have simple features like flashing and changing color with a button press, others actually connect via Bluetooth to one’s smartphone, not only allowing the user to control their lightstick with an app, but in some situations, allowing the lighting technician to control the lightstick, letting them make light patterns in the audience during the concert. The sticks sell for around $30 in Korea, which with shipping and overhead translates more to $50-$70 in the US.