Innotek Contain-INN-ZND1000 Extra Zone Extra transmitter for Zones systems ZND-1200&#44; ZND-1300&#44; IUC-4100&#44; IUC-4200&#44; IUC-5100 Instantly keeps the dog away from problem areas in the home. No training or installation required; simply place in area dog should avoid. Protects an area from 2- to 12-feet in diameter; runs on 3 AA batteries. Measures 4-3/4 by 4-3/4 by 1-1/8 inches; limited lifetime warranty.