46 dB active wideband noise cancellation: For aircraft, subterranean, and other low-frequency noise scenarios, noise reduction depths of up to 46dB and 99.5% of background noise are achieved while simultaneously encompassing the 2kHz noise range. More sophisticated Convenient Noise Abatement Independent rear chamber structure: To guarantee outstanding dynamic frequency range and sound consistency, the Redmi Buds 5 feature an independent rear chamber structure. This makes the high, medium, and low frequency levels distinct and produces a more three-dimensional, full-bodied sound. Ultra-long battery life of 40 hours: A single headset's battery lasts 10 hours, but a charging case can extend that to 40 hours. incredibly long battery life to accommodate extended use. with strong, quick charging. Listen to music for two hours after charging for five minutes.