Motorola RLN6230, Extreme Noise Kit - Includes 2 foam earplugs. For High Noise Environments. Noise Reduction = 24dB. The Quick Disconnect Adapter allows users to easily remove or alternate Acoustic Tubes (for use with Surveillance Accessories). Black, The coil translucent tube attaches to 1-wire and 2-wire surveillance kits. The attached clothing clip prevents the accessory from being pulled from the ear due to body movement or head rotation.