There are two things I particularly like about the Howard Leight design. First, the battery compartment is accessible from the outside. Many electronic earmuffs have battery compartments inside, behind the foam that covers your ear. On hot days, this area can get sweaty and you have to remember to open up the compartment, remove the batteries, and let things dry out. Second, the on/off and volume control is a single dial that is inset into the earmuff body. It’s very unlikely to get inadvertently turned on while bouncing around the inside of your shooting bag. On more bonus feature: the Impact Pros feature a music-input jack. If you shoot your best while listening to old DEVO tunes, knock yourself out!