KiT Zero is the battery-free KiT inside the KiTalbum, a pocket-sized collectible album format for smart devices. Each KiTalbum pairs collectibles such as art cards and photocards with music, video and images in the KiTplayer app. When a fan presses the KiT, the motion makes its own electricity, turning a gear train and coreless generator to power one transmission. The KiT emits a short, inaudible ultrasonic signal that a phone or tablet microphone recognizes, and KiTplayer opens and downloads the album in lossless audio, video and images. Because the album is tied to the KiT rather than an account, it can be handed to another person but not copied. Earlier KiT used a CR2032 coin cell. More than 10 million KiTalbums have shipped since 2017, and sales count toward national album charts in Korea, the United Kingdom, Germany and Australia, and in the United States from 2 October 2026.