1WEATHER RESISTANT CONNECTION: This waterproof junction box provides a waterproof sealing to defend outdoor and indoor plug connections from water, snow, rain, dust, and dirt, ensuring circuit safety (only waterproof, do not submerge it in water). 2SPACIOUS AND ADJUSTABLE COMPARTMENTS: The large casing can accommodate multiple connections and one to one connections; compatible with AWG 12 14 16 extension cords and flat cables; slide the adjustable limiter to fit different lengths of connections. 3SECURE AND TIGHT CONNECTION: The rubber seals at both ends fit well with the power cord; 2 clips securely fasten the wires in place; the adjustable anti slip sawtooth ensures a secure connection even when the power cord is pulled during use, preventing the plug from sliding or disconnecting. 4DOUBLE LOCKING AND PROTECTION: The top cover and 4 additional durable locks enhance the outdoor extension cord's safety and sealing; the 4 lockable locks secure the power cord junction box, even if the top cover breaks, it can still be used safely. 5EASY TO USE: No tools or installation required; correctly place the extension cord; slide the limiter to maintain a secure wire connection; lock the top cover and 4 locks for sealing; hanging it to save space; perfect for holiday lights, light strings, pool pumps, and gardening tools.