Sennheiser has created a music phone friendly version of its CX 300 earphones. Claiming to be the first quality in-ear headphones to be made available with a 2.5mm headphone jack, they boast improved sound quality for music phones. The CX 300s feature an advanced, miniaturised driver, designed to give smooth, acoustically correct in-ear operation, with an extended response of 18Hz-21kHz. They come with three different sizes of ear adapters for a perfect fit, which also means that sound leakage is minimised, thus reducing annoyance to other people. They feature powerful, bass-driven stereo sound, and an asymmetrical cable for optimum wearing comfort. If you want pink, though, you'll have to look elsewhere. Available now, priced £39.99. Sennheiser