ISOTUNES IT-21 - PRO 2.0 Bluetooth Earplug Headphones TILE CUTTING and expansion slots dissipate heat

and expansion slots dissipate heat

and Height adjustment tool

It is only 4-5/8 in

The DW257 2

ISOTUNES IT-21 - PRO 2.0 Bluetooth Earplug Headphones TILE CUTTING and expansion slots dissipate heatProfessional Bluetooth hearing protector designed for all day use in the toughest and loudest environments. Sweat, water, and dust resistant with premium aptX sound quality, 27 NRR, and 10+ hours of music and talk time. 16+ hour battery life IP67 dust, water, and sweat proof Bluetooth 5. 0 Redesigned comfort fit earhook 27 dB NRR OSHA and NIOSH compliant SafeMax 85dB volume limit Chrome plated brass ear stem Background noise canceling for calls