A reliable, USA‑standard 7pin (7p) 7core 1to2 connection cable designed to extend and split trailer power connections for RVs, cars, trucks and trailers. Built for everyday towing and outdoor use, this waterproof extension cable delivers consistent electrical signals for lights, brakes and auxiliary power while protecting connections from moisture and road debris. Why you need this cable Split or extend a single 7pin trailer socket into two connections without rewiring the vehicle or trailer. Keep lights, turn signals, electric brakes and 12V auxiliary power functioning reliably in wet or dusty conditions. Avoid costly downtime and risky temporary fixes by using a purposebuilt, weatherresistant connector cable for towing and RV applications. Key benefits Plugandplay convenience: Use directly with any USA‑standard 7pin trailer socket; no special tools or modifications required. Weather protection: Waterproof construction helps prevent corrosion and signal loss from rain, splash and road grime. Reliable performance: 7core design supports all standard 7pin functions to maintain lighting, brake control, ground and auxiliary power. Versatile splitter: 1to2 configuration lets you connect two trailers or a trailer and an accessory from a single vehicle outlet. Main features and attributes Configuration: 1to2 7pin (7p) splitter/extension cable (one input to two outputs). Wiring: 7core cable supporting standard 7pin trailer circuits. Compatibility: USA standard 7pin sockets on cars, trucks, SUVs, RVs, trailers, and marine trailers. Durability: Designed for outdoor use with sealed connectors and a weatherresistant jacket for protection from moisture and contaminants. Use cases supported: lighting circuits, electric trailer brakes, ground and 12V auxiliary power. Typical applications Towing two small trailers or utility trailers behind a single vehicle for shorthaul needs (where legal and safe in your area). Connecting an RV or camper to a tow vehicle while simultaneously powering a trailermounted accessory or second trailer. Replacing or extending a damaged trailer cable temporarily during travel without modifying vehicle wiring. Simple use and installation tips Align the 7pin plugs with the socket and push in firmly until latched; secure any locking rings if present. Ensure connections are clean and dry before storage to prolong service life. Check all lighting and brake functions after connection and before driving. Who this is for RV owners, boat trailers, utility and camping trailer users who need a reliable, weather‑resistant 7pin splitter or extension. Tow operators and DIY vehicle owners who want an easy, safe way to power multiple trailer connections from one USA‑standard 7pin outlet. This USA‑style 7core 1to2 plug connection cable provides a straightforward, durable solution to extend and split standard 7pin trailer power connections while keeping electrical contacts protected from the elements.