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The headset has a built-in Bluetooth 5.0  to be called a new generation of headphones. Redmi is equipped with the latest Bluetooth 5.0, the data transfer rate is up to 2 times compared to the previous generation, the connection is faster and more stable. Listening to music and playing is smoother and softer
• Noise Reduction of 7.2mm Moving Coil Drive Unit and DSP Intelligent Environment Noise Reduction: 
• when material and setting are the same, the larger the size of the speaker unit, the better of the low frequency
• The Redmi  are equipped with a 7.2 mm sound unit, which has a low frequency dip and a medium to high frequency. 
• Free to adjust, comfortable to wear, not easy to fall
• Lightweight and comfortable to wear is the highlight of Redmi 
• Thanks to the strict weight control of the single headset at 4.1 g. You do not have to worry about it falling down
• We have prepared 3 models of ear protectors to meet your highest demands of closure and firmness, even when running, punching and listening to music. 
• 4 hours battery life with charging box. Using the time extends to 12 hours. The storage box is also a loading box
• The headset can not only be protected and stored, but the headset can be charged twice as much
• Automatic second connection
• Bluetooth 5.0, the connection is more stable
• 12h long battery life, with charging box
• Double-ear multifunction button, anti-missing
• Summon voice assistant, voice control mobile phone
• Comfortable to wear, self-adjusting, not easy to fall off
• Headphone Battery Capacity: 40mAh
• Charging Box Battery Capacity: 300mAh