The Niles Audio AC-3 Voltage-Triggered AC Power Strip can be used to control the AC power of amplifier, receivers, source components, surround sound systems, home theater systems, or for any application where a voltage-activated AC outlet is preferred. The AC-3 has three grounded outlets -two switched and one unswitched. The two switched are activated by applying 12 volts DC to the AC-3's "Control Input" connector. A "Control Output" connector is also provided (it is connected internally in parallel with the Control Input). The Control Output can be used to control additional AC-3's by 'daisy-chaining ' them together (a maximum of six may be daisy-chained together).