Hi Tom:Some people like a hardwire option like the 12V Trigger. But not all 12V triggers are created equal, so it may or may not work. But if and when it does it is instant on and off. Audio Sensing works on all applications, but you have to wait 15 minutes to turn off. Standby Power draw is 1.8W (listed in the specs in the owner's manual). Actual Energy-saving rating would be between .5 and 1 watt.TL/5670