PetPals Group 49035 Carpet Multi Level Cat House 69 Inch wireless dog fence poly elastomer strap that is integral poly elastomer strap that is integral with the radio box and you've got THE state of the art electronic collar at an amazing value An internal thermostat keeps the temperature at a desirable 100 Degree when in use Built for rough play this carpeted cat contraption includes a rope for swatting all natural sisal covered posts for scratching a tunnel for hiding and multiple levels for jumping and perching With fifteen years of cross global production and manufacturing experience PetPals maintains strong relationships with its sellers in order to bring customers high quality earth conscious items