TEK Antenna Retainer BandsTEK Antenna Retainer Bands fit all TEK Series systems. These bands not only sleek back the e collar module antenna on the TEK Series GPS Tracking and Training system (TEK V1LT), they also color correspond to your TEK Series Handheld Device's collar color options giving you an easy reference to remember which dog has been assigned to which collar color. All 12 color options are included in this pack.