This number display system is designed for large scale activities in a variety of venues, including communities, parks, schools and other institutions. It enables orderly, scalable events by providing easily changeable numbers with dependable color stability. Key benefits Broad applicability: suitable for communities, parks, institutions, schools and similar venues to run mass sports, fitness and entertainment activities. Easy number updates: digits can be changed quickly, allowing fast reconfiguration for scores, event IDs, lanes, or other identifiers. Color stable: numbers do not discolor over time, preserving readability. Easy to maintain: simple to update and service as needed. Typical use scenarios School sports day or gym events: update team numbers, scores, or round identifiers between activities. Park recreation or community fitness festival: swap digits to designate activity lanes, class numbers, or event IDs as schedules change. Campus or institutional events: use for large gatherings to manage registration numbers, seating blocks, or program identifiers with rapid updates. Notes Function: supports quick digit changes to adapt to varying event needs. Compatibility: suitable for a range of venues that host mass sports, fitness and entertainment activities. Size and material: not specified in the provided information; described herein by its functional use and performance characteristics. Performance: designed to maintain legibility through easy number changes and color stability without discoloration over time.