Etymotic Filter Tuning Kit - Designed for ER Series Earphones - Includes 4 Filte solar lantern Flash Sync Speed: 1/250

Flash Sync Speed: 1/250

1xAA (Not Included)

Simply insert the batteries as noted in the packaging instructions

Lip Protectant Stick

Pattern: SpongeBob’s Pineapple House

Etymotic Filter Tuning Kit - Designed for ER Series Earphones - Includes 4 Filte solar lantern Flash Sync Speed: 1/250Product 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