Klipsch R6 In-Ear Bluetooth Wireless Headphones with Bluetooth 4.0 and Apt-X Streaming With Built in Mic High Definition AptX Streaming, Bluetooth 4.0 for Music Streaming and Handsfree calls KG 065 Dynamic Dual Magnet Micro Drivers With Full Bass Dynamic Driver Battery Status Monitor for iOS Devices Four Patented Oval ear Tips Sizes for Different Shaped Ears Noise isolation: 22 dB