The Mensa Mains 3Way provides safe electric power for campsites that provide a mains electricity hook-up. The 15m cable doesn't restrict you and you're protected by the built in circuit breaker. The three sockets are dust and splash proof and two USB ports are ideal for charging tables and phones. A built in 74 LED light helps to light your tent at night and a 1 LED night light helps guide those up at night. The practical roll up reel makes light work of packing up camp.