soundcore by Anker Liberty 4 NC Wireless Bluetooth Earbuds with 98.5% Noise Cancellation, Bluetooth 5.3, Adaptive Noise Reduction for Ears and Environment, Hi-Res Sound, 50H Playback REDUCE NOISE UP TO 98.5%: The soundcore Liberty 4 NC wireless Bluetooth earbuds feature a high-sensitivity in-ear sound sensor, oversized speaker, and innovative sound isolation chamber that eliminates up to 98.5% of noise for peaceful travel. NOISE CANCELLATION ADAPTS TO EARS AND ENVIRONMENTS: Adaptive ANC 2.0 performs real-time calculations and adjustments based on your ear canals and external environment, providing maximum silence amidst the noise. CLEAR SOUND WITH 3 TIMES MORE DETAIL: Custom-tuned 11mm speakers deliver always clear and detailed sound. Experience high-resolution wireless audio and LDAC technology, which transfers 3 times more data than standard Bluetooth - bringing wireless music to life. CUSTOMIZE YOUR SOUND PROFILE: Not everyone listens the same way. Use HearID 2.0 to find the perfect sound profile for you. If you prefer to mix sounds, the equalizer is fully adjustable or you can choose from 22 presets to match your music. 10H/50H WORRY-FREE BATTERY LIFE: One charge is enough for uninterrupted entertainment during a trip across the United States. Pack the Liberty 4 NC wireless earbuds for your next adventure and enjoy 1000 tracks or watch 30 movies in a row without worrying about the battery.