I have it on my left side (detector in right hand), when using the GPX and GPZ. I like it on my waist belt as it's out of the way, and seems to be the furthest point from your coil when you are kneeling down to recover a target. If using the SDC, I find it easiest to clip on the side of the control box cover. Then I can use wired or wireless headphones depending on where I'm detecting.