Wireless Bluetooth Sports In-ear Earbuds Noise Cancelling Headphones Microphone V4.0+ERD (Black) Fully exercise-proof: with functional user interface, earpiece design, and a 10-meter working distance, our headphones will let you enjoy music through a variety of activities. Universal device compatibility: the Kinetic Series Headphones are compatible with most Bluetooth-enabled phones, and reduce external sound. Simple-to-use: control all functions of your music (volume, sound, song selection) and calls from your phone via our simple-to-use user interface on the headphones themselves. Bluetooth version :CSR8635/V4.0+ERD . allow you to change volume, play and pause your music, and answer the phone without skipping a beat .