Addiotional specs :
Immersive sound for a live immersive experience : redmi buds 4 pro features an all-new immersive sound system, which uses a xiaomi proprietary hrtf sound algorithm to simulate real-life sound and a deliver a truly immersive experience when watching video, compatible with various audio source and playback devices.
Up to 43db active noise cancellation : the earbuds can reduce noise by up to 43db, blocking up to 99.3% of external noise*, allowing you to enjoy your music in peace and quiet.
Dual transparency mode : in regular transparency mode, you can hear your surroundings without having to remove the earbuds. You can also switch to enhance voice mode when you need to talk to someone face to face.
Earbud input parameters : 5.25v ⎓ 160ma max（single earbud）
Charging case input parameters : 5v ⎓ 0.5a max
Charging port : type-c
Wireless connection : bluetooth® 5.3
Bluetooth protocols : bluetooth low energy / hfp / a2dp / avrcp
Operating distance : 10m (open space free of obstacles)
Speaker impedance : 24ω