Evolt TWS-200 features Active Noise Cancellation which actively counters the background noise, firstly by detecting & analyzing external noise & then by generating a reverse signal to cancel it. Once this background noise is suppressed, you will then be able to enrich your music experience thanks to the Evolt TWS high quality speaker drivers, hands free microphones & master-slave switching which allows you to use the earbuds in stereo as well as mono mode. Additionally it features a digital battery level which tells you the battery capacity the charging case as well as the earbuds carry in them. We have also included a stylish & protective silicone cover with this packaging which adds both durability & style to your True wireless earbuds on the go.