46dB wideband active noise cancellation: Noise reduction depth up to 46dB, up to 99.5% of the background noise; at the same time covering the 2kHz noise range, for aircraft, underground and other low-frequency noise scenarios. Advanced Comfortable Noise Reduction Independent rear chamber structure: Redmi Buds 5 has an independent rear chamber structure to ensure excellent dynamic frequency range and sound consistency, so that the high, medium and low frequency levels are distinct, and the sound is more three-dimensional and full-bodied 40 hours of ultra-long battery life: 10 hours of battery life for single headset, up to 40 hours with charging case Ultra-long battery life to meet the needs of long-time use. With powerful fast charging. Charge for 5 minutes, listen to songs for 2 hours Small cloud light body: Charging compartment with cloud appearance design, lightweight and portable. Cloud gap light status light, five lamp beads form a strip breathing light effect Rod design is comfortable to wear. Three pass-through modes available