How is the M20 different from standard earplugs?

Standard foam plugs only block sound. The M20 has electronics that amplify quiet sounds while cutting loud impulses, so you can hear range commands and conversation.

Do I still need over-ear muffs with these?

Many shooters use in-ear protectors alone for pistol and rifle shooting. For very loud indoor ranges or large calibers, some double up with muffs over them.

How do I get a good seal?

The protection depends on the ear tip sealing in your ear canal. Try the different tip sizes and reseat them until outside sound is muffled before you turn the electronics on.

Do they need batteries?

Yes, the electronic amplification runs on batteries. Without power they still act as passive plugs, but you lose the sound amplification.

Are they comfortable for long sessions?

In-ear protectors are generally lighter than muffs, but comfort depends on tip fit. Some users find pressure builds after several hours and prefer breaks.

Can I use them for hunting?

Yes. The amplification helps you hear movement and game while still suppressing the shot, which is why hunters often choose electronic in-ear protectors.