If you want the ultimate in comfort, style and performance, in a headset, this is it! Its sleek design combines both hard plastic (blue color) and soft flexible rubber (black color). The soft Ear-Gels earpiece fits directly into your ear providing maximum volume and eliminating background noise. Included are 2 Ear-Gels, small and large, to ensure a perfect fit. This product also incorporates “tangle free” wire technology that virtually eliminates the twisted mess of wires you may have had in the past. Can be used with all phone models (not just Blackberry phones) that have a 2.5mm headset jack. Most phone models, except for Nokia, use this type of jack.