100PCS 125KHz RFID Key Fobs, EM4100 Read Only Proximity ID Keychains Compatible with Most RFID Copiers for Access Control, Apartment, Office & Parking Entry Systems

["Reliable 125KHz RFID Performance：Designed for stable and fast signal response, these 125KHz RFID key fobs work with most standard RFID access control and entry systems for everyday commercial and residential use.","Read Only EM4100 Chip：Built with read only EM4100 proximity chips featuring pre-programmed unique IDs for consistent performance and dependable identification.","Compatible with Most RFID Copiers：These RFID keychains can be recognized by most common 125KHz RFID copier devices, making them suitable for access management, duplication services, and system testing.","Ideal for Multiple Access Applications：Perfect for apartments, office buildings, parking garages, gyms, attendance systems, gated communities, and other RFID-based entry environments.","Durable ABS Key Fob Design：Made from durable ABS material with a compact lightweight design for everyday carrying. Each key fob includes a metal key ring for convenient attachment."]