Wireless earbuds that combine high-quality sound and noise cancellation. This is a brand new, unopened replacement unit. I'm selling it because I bought a new one when the previous one broke. The sound quality is the best of any product, and the noise cancellation is so effective that it's almost as quiet as Bose, so I really like it. - Brand: Sennheiser - Model Name: Momentum True Wireless 4 - Waterproof Rating: IP54 - Bluetooth Version: Bluetooth 5.0 - Battery Life: 30 hours - Sound Quality Technology: Qualcomm aptX Adaptive - App Compatibility: Sennheiser Smart Control App - Compatibility: iPhone, iPad, Android Thank you for looking.