Stand alone model, 8 outlets (2 always on, 6 switched), built-in circuit breaker, 15 amp, isolated receptacles. WVR-TSC is the Ultimate in Surge Protection. Totally eliminates dangerous surge energy, Improves power quality, Increases product reliability, Prevents downtime due to power line surges, Offers optimal protection during brownouts and blackouts. Provides 10 year certified protection for worst case surges.