These are aweful - ISOtunes Sport OPMOD CALIBER True Wireless Tactical Earbuds With Bluetooth, 25 NRR

I bought these as a backup to my Walker's Bluetooth earbuds and to see if maybe I like these better anyway. If not, I can let one of my kids use them at the range. The sound quality in "shooting" mode is terrible. When the crack of a bullet or even when you clap next to your ear, they do kill the dangerous sounds but only by going completely blank and taking a second or so to "ramp up" the volume again. So, you hear OK (not the best reproduction of the natural environment), you shoot a round (or clap) and your earbuds go to complete zero decibels, then get louder back up to where the sound was, only to go silent again at the next loud noise.
I have 4 different types & brands of active noise limiting hearing devices. Two over the ear muff models and two earbud models and these don't function like any of the others and therefore are pretty worthless.
I obviously wasn't paying attention when I purchased them and so didn't notice they were unreturnable. I've bought thousands of $$ of gear on OP (several of which are OPMOD models) and this is the only purchase I completely regret. 100 bucks down the drain because they are awful and OP won't take them back.

BUYER BEWARE! You might want to pony up more cash for something that works properly.