Etymotic Filter Tuning Kit - Designed for ER Series Earphones - Includes 4 Filte solar lantern 1xAA (Not Included)

1xAA (Not Included)

Pattern: SpongeBob’s Pineapple House

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4GHz Wi-Fi

Lip Protectant Stick

Etymotic Filter Tuning Kit - Designed for ER Series Earphones - Includes 4 Filte solar lantern 1xAA (Not Included)Product Description FILTER TUNING KIT Tune your earphones to have a different sound. This kit is designed for the ER Series Earphones and includes four filters of each color: white, brown, green, red & orange.,WHY USE A FILTER What we hear from a hearing device sounds different as we all have different frequency curves to our natural hearing. Etymotic allows listeners to tune their Etymotic ER series earphones to their own tastes & hearing