Comfort pads for the RX-090, RX-120, RX-150, and the RX-1000 were designed for short fur, long fur, or thick fur canines. Comfort pads provide maximum comfort, redistribute the pressure from standard contact points, and allows for stimulation to be more evenly distributed, while promoting better contact and reactivity. If your dog is sensitive to the standard contact points or will be wearing an e-collar for extended periods of time, E-Collar Technologies recommends the use of a comfort pad. Remember to consider your dog’s coat length and density when choosing contact points and comfort pads so your dog’s collar makes a good connection and will work correctly. This receiver comes standard with: Mini Educator ET-300/302 Educator ET-400/402 Easy Educator EZ-900/902/903/904 Finger Trainer FT-330 K9 400 Handler K9-400/402 Pro Educator PE-900/902/903