Walker's Disrupter Guide D'utilisation page 4

FOAM TIP FITMENT
1
Choose the foam ear tip that best fits your ear. This ear tip must form
a complete seal, blocking out sound.
Roll the foam tip between your fingers until it becomes malleable.
Quickly insert the earbuds into your ear canal as deeply as you can
without discomfort. Hold them in place for 10 seconds to ensure the
foam tip expands and seals in your ear canal.
Clap your hands to make sure sound is significantly reduced.
If not, re-fit in ears or try a different size foam tip.
WARNING: Improper fitting or use of this Walkers product can result in a
reduction in the device's ability to protect from hearing loss and potentially
cause damage to your hearing. Choose the right ear tip size to best protect
your hearing.
4
DO NOT USE SILICONE TIPS FOR SHOOTING.