Smallest true wireless microbuds HD audio with 6mm dynamic driver Built-in Bluetooth Simple one touch controls Built-in microphones for stereo hands-free calling The Blueant Pump Air2 Wireless In-Ear Sports Headphones ensure a perfect fit and an awesome listening experience with the included 7 sizes of eartips. Smallest true wireless microbuds HD audio with 6mm dynamic driver Built-in Bluetooth Simple one touch controls Built-in microphones for stereo hands-free calling 4 hours of playtime IP54 rated sweat proof Lightweight and easy to set up Includes 7 sizes of ComfortSeal tips The Blueant Pump Air2 Wireless In-Ear Sports Headphones deliver mega bass to drive your active lifestyle via high quality 6mm drivers. These headphones provide around 4 hours of listening at 75% volume and a further 12 hours with the charging case. The connectivity is faster range has been increased and power usage has been optimised by utilising the latest Bluetooth 5.0 technology.