New never used!! Wireless pet containment system by PetSafe. Includes a gray main transmitter and a red adjustable training collar, boundary flags and extra batteries. Compact design and simple controls. Reliable boundary solution for pets. ~Contain your dog without building a fence or burying wires ~Circular boundary adjusts to cover a 1/2-acre yard (10-180 ft diameter) ~Our proprietary circular boundary gently guides your dog back to his play area, giving you the most accurate wireless fence experience ~Sets up in 1-2 hours Portable for when you travel (outlet required) ~Includes 1 Wireless Pet Containment System Receiver Collar ~Tone-only mode and 5 levels of adjustable static correction ~Waterproof collar adjusts to fit neck sizes 6-28 in ~Purchase additional collars for all your pets ~Receiver collar requires 1 RFA-67 battery, included ~Battery lasts approximately 1-2 months For dogs 8 lb and up and who are at least 6 months old ~With over 25,000 5-star ratings and awarded best wireless dog fence overall by Forbes, PetSafe is the top choice for pet parents ~Our static collars are part of our ongoing mission to provide the best tools, education and support for pet parents seeking safe, effective, expert-recommended options they can trust to meet each dog’s unique training needs