The Videx PBX-1E VProx 125Khz EM Proximity ABS Fobs come with individual numbering for easy distribution. They work seamlessly with Portal Plus, and can be used with reader modules for the Videx 4000, VR4K, and VR series. The fobs are designed to be compact, which makes it convenient to attach to keyrings.Product Features:Sold in packs of 10Uniquely numberedComes in ABS plastic packaging