On the hike out of the woods this weekend I ripped my headphones apart. They were nice Sony stereo studio headphones. This afternoon I took my wife out to see a cool mushroom I found. I was half heartedly swinging with some Apple ear buds I found laying around the house. When I heard my first signal I was mortified that I HAD NO IDEA WHAT THE TARGET WAS, OR HOW DEEP, OR HOW BIG! The only info I got was my normal VDI which (on the T2) is secondary. I learned that not only do you have to learn your detector but you have to learn your head phones too!