Boost your sound with Sennheiser’s cx 300s earphones which offer amazingly detailed sound reproduction and enhanced bass response thanks to Sennheisers transducer technology. The in-ear design reduces ambient noise to a minimum and the included set of ear-adapters guarantees an individualized fit with four sizes (xs, s, m, l) to choose from. A smart remote enables you to pause music and take calls across all devices. This product is the successor of the CX 300 with a remote.