Musicians Hi-Fi Filters Filter Selection:IS31 (Yellow) -31dB the case’s built-in 5000 mAh

the case’s built-in 5000 mAh lithium battery gets charged via a standard USB-C port

The bass has fast attack

Lithium powered battery

you must first contact Manufacturer's customer service department during the Warranty Period to receive a Return Merchandise Authorization (RMA) number

Musicians Hi-Fi Filters Filter Selection:IS31 (Yellow) -31dB the case’s built-in 5000 mAhHi Fi Filters Replacement or Alternative filter modules for the Custom Hi Fi Musician Earplugs. All filters feature our targeted attenuation delivering a flat response to your eardrum. The P&Q version is solid, providing maximum attenuation. Buy one of our 3 Pack special bundles for a discounted price. Sold as pairs (2 filters: A Right Left pair per attenuation level) Z22 FILTER BUNDLE READ BELOW Your Z22 comes standard with two filter pair: 19dB and