soundcore Liberty 4 NC - Wireless Noise Cancelling Earbuds (Black) - 98.5% Noise Reduction - draadloze oordopjes -Adaptive Noise Cancelling to Ears and Environment - Hi-Res Sound - 50H BatteryReduce Noise By Up to 98. 5%: Liberty 4 NC noise cancelling earbuds have a high sensitivity inear sound sensor, an oversized driver, and an innovative noise isolation chamber that cancels up to 98. 5% of noise for peaceful travel. Noise Cancelling Adapts to Ears and Environments: Adaptive ANC 2. 0 makes real time calculations and adjusts to your ear canals and external environment for maximum quiet amongst the hustle and bustle. Crisp Sound with 3