When the pet door application at your home requires the ultimate in convenience and security, the Plexidor PDE Electronic Pet Door is the choice of pet owners worldwide. The PDE hardened ABS panel slides effortlessly up and down like a mini electronic garage door. When the unit is inactive, the panel acts as security door keeping out unwanted guests. Using state-of-the art RFID technology (Radio Frequency Identification Device), the sensor reads the pre-programmed collar key code and opens and closes the door automatically for your pet only, while keeping other animals outside. The waterproof collar key weighs just 0.4 ounces and snaps onto your pet's collar. The door reads your pre-programmed key code as your pet approaches and when recognized, automatically opens and closes the door allowing access for your pet. You can set the unit to control the timing of how long the door remains open. The Plexidor PDE Electronic Pet Door plugs into a standard household outlet or can be hardwired. Easy to program and even easier to use, the Plexidor Electronic Pet Door will provide years of enjoyment for your family and pet.