Three AC Outlets two Switched, One Unswitched; 1,500W Maximum (all Outlets Combined) AC-3 Is Activated By 12Volt DC Signal (100mA Minimum) Requires 12Volt DC Adapter To Trigger AC-3 From The Switched Outlet Of A Receiver Or Preamp, Can Also Be Triggered By The 12volt Output Of A Niles APC-2, AC-3, SPK-1, SAS-1 Or RFS-1 12Volt Control Output For Activating Other Niles Devices Such As An APC-2, AC-3, SPK-1, SAS-1 Or RFS-1 Dimensions 5-1/4" Wide X 2-1/4" High X 4-1/4" Deep