The Sennheiser CX 350BT Wireless Earphones with Mic are the ideal companion for great sounding audio on the go. With support for the commonly used wireless technologies including Bluetooth 5.0, AAC and AptX? Low Latency, the CX 350BT delivers a great listening experience. It ensures a truly personal listening experience thanks to the Sennheiser Smart Control App, which allows for sound customization via its equalizer. Along with the personalization features, the app provides battery status, a Quick Guide, firmware updates and a podcast mode for optimized speech.