This Avery Self-Adhesive Visitor Paper Badges Roll includes 250 badges designed to stick directly to clothing and remove cleanly without leaving residue. Each badge features a time-expiring tab with patented VOID technology. Once activated, the tab gradually turns pink and displays the word 'VOID' after 4 to 6 hours. These badges are compatible with direct thermal printers. The red ink expiry tab contains specially formulated ink that activates upon application. These badges are perfect for schools, offices, events, and secure facilities.