Does the MX PASSIVE need batteries?

No. It is a passive earmuff, so attenuation comes from its shell and cushions alone. There is nothing to charge or switch on.

Can I wear it with a hard hat?

Yes. It is designed to be helmet compatible, so it fits under or onto a hard hat setup.

Only faintly. Passive muffs cut speech along with noise, and there is no amplification or pass-through mode.

It will block gunfire noise, but without amplification you cannot hear range commands or conversation. Electronic muffs suit that better.

It gives up amplification, Bluetooth and audio input, but has no batteries or circuits to fail and is simpler to maintain.

It is built to withstand dust, sweat and water, but it is not described as submersible.

At AAA Police Supply, for $16.99, 32% under what the other stores charge, as of our latest check.

Rated 4.9 out of 5 from 22 ratings.

14 stores we checked sell it, including AAA Police Supply, Amazon, Home Depot, AXIL, GoGear Direct.

$16.99at AAA Police SupplyChecked 1 h ago

32% under what the other stores charge

Compared across 14 stores. Prices are checked against each store and labelled with when.

It checks today's price at every store, compares the alternatives and answers in about a minute.