This PetSafe Wireless Pet Containment System IF101 Transmitter Unit is an essential tool for pet owners looking to provide their furry friends with a safe and spacious environment to play in. The unit is designed to work with PetSafe wireless pet fences and provides a reliable and efficient way to contain your pet within a specific area. The transmitter unit is made by PetSafe, a well-known brand in the pet supplies industry, and is specifically designed for use with dogs. The unit is easy to set up and use, and provides a humane and effective way to train your pet. The IF101 model is a top-of-the-line product that offers pet owners a high-quality solution for their pet containment needs.