The ER-20 Ultra-Tech earplugs have the same acoustic properties and the same construction as the ER-20 Hi-Fi earplugs. The only difference is the color and a removable retaining cord for convenience.
These plugs are mainly used as an inexpensive musician’s earplug and have principles to allow the user to still hear through a inserted resonator within the stem that allows outside tones such as vocal or musical to be heard.
- Low cost
- 20dB attenuation
- Music is heard clearly
- Good frequency response accuracy
- Available in a variety of colors
- Supplied with matching cord and case – except beige/black cord and clear/black cord
Note: Baby Blue style features smaller tips for small ear canals – will have a baby blue colored flanged tip with clear stem and blue cord.