Function Switch Box w/ Progressive Slide Switch with illuminated Legends are backlit for easy night usage. One 40 amp circuit protected by a relay and self resetting circuit breaker, Five 20 amp circuits are individually protected by fuses. Size: L 4.5" / W 4.63" / H 2.13" Switching: (1) 40 amp circuit (5) 20 amp circuits Weight: 5 lbs.