SmartPlug. 20 x Electrical Contact. Eliminating Overheating! The SmartPlug Combo Kit includes both a inlet connector and a retro-fit connector. The retro-fit connector is designed to be used with your existing cord.    *SAFE     *SIMPLE     *SECURE  SmartPlug’s 4-Stage solution protects against overheating every step of the way. Loose connections are addressed by a Sleeve Design and Multi-Point Locking System which take all the physical stress off of the pins while securely fastening the plug to receptacle. Pin contact area is increased by more than 20x and protected behind three weatherproof seals for a dry and corrosion-free connection.