Description These true wireless, minimal design earbuds fit securely in your ears, and with digital noise cancelling, all you hear is your music. The Smart Listening technology can detect your activity and adjust the noise cancelling levels appropriately, and with a chargeable case, you’ll get up to 9 hours of uninterrupted, undisturbed sound wherever you go. Features & details True wireless design with uninterrupted Bluetooth streaming. Digital Noise Cancelling lets you listen without distractions. Sony|Headphones Connect APP for Android /iOS uses Smart Listening technology to control your ambient sound settings . Smart Listening by Adaptive Sound Control automatically switches to ambient sound mode based on your activity. Ambient Sound mode to hear essential sound without taking your headphones off. A 6mm driver for crisp, clear sound Enjoy up to 9 hours of battery life with the chargeable carrying case. Conversation flows freely with hands-free calling through the left earpiece. Leave your phone where it is: just speak with a tap. In the box: Charging Case, USB Cable (1), Earbuds (Long Hybrid silicone rubber earbuds(SS, S, M, L X2), Fitting Supporters(M, L X2), Triple-Comfort Earbuds(S, M, L X2)) Connectivity technology : Bluetooth