Westone 1 True-Fit Earphone The Westone 1 is the perfect upgrade from stock music player earbuds. A single balanced armature driver delivers accurate reproduction and musical fidelity that has to be heard to be believed. Lightweight and extremely comfortable, the Westone 1 provides up to 25 dB of noise reduction. Compatible with virtually any personal listening device. Equipped with a 3.5-mm stereo plug, the Westone 1 is compatible with virtually any personal listening device.