Etymotic ER3XR LE Bluetooth Headphones The patented anti-microbial solution used

The patented anti-microbial solution used in the PerfectClean system is electronics safe

allowing you to use them while you walk

Features of the ER3SE include sleek precision machined metal bodies

Paired with the Etymotion BT cable

Etymotic ER3XR LE Bluetooth Headphones The patented anti-microbial solution usedIf you prefer a modest boost in bass, these Etymotic ER3XR Extended Response earphones deliver the same sound quality as the ER3SE, for portable media players along with a stronger low end response. You get the same top level high fidelity from the use of gold standard balanced armature drivers as along with highly accurate sound reproduction from the mids and highs, but with a boost in bass. ER3XR earphones come with the same sleek precision machined