1:Comes with large capacity charging case to provide up to 12 hours working time. 2:Built-in 7.2mm sound unit to provide low-frequency dive and medium-to-high frequency. 3:Works with advanced Bluetooth 5.0 technology to provide faster and stabler connection, compared with Bluetooth 4.0 earphones." Redmi AirDots True wireless bluetooth headset Bluetooth 5.0, Automatically connected A new experience of true wireless Automatic seconds connection, can be used with headphones Small headphones with built-in chips A new generation of Bluetooth 5.0, faster and more stable The headset has a built-in Bluetooth 5.0 chip to be called a new generation of headphones. Redmi AirDots is equipped with the latest Bluetooth 5.0 chip, the data transfer rate is up to 2 times compared with the previous generation, the connection is faster and more stable Listening to songs and playing games are all smoother and smoother. The music is nice and the call is clear Noise reduction from 7.2mm moving coil drive unit and DSP intelligent environment And DSP intelligent environment noise reduction When the material and tuning are the same, the larger the speaker unit size, the better the low frequency. The Redmi AirDots are equipped with a 7.2mm sound unit, which has a low-frequency dive and a medium-to-high frequency. In the compact design, we still equipped you with DSP intelligent environment noise reduction technology, you don\'t have to worry about the quality of the call, it can remove the environmental noise, the other can clearly hear your voice. Free to adjust, comfortable to wear, not easy to fall off Light weight and comfortable to wear is the highlight of Redmi AirDots, thanks to the strict weight control of the single earphone at 4.1g. You don\'t have to worry about it falling off. We have prepared 3 models of earplugs to meet your higher requirements for closure and firmness, even when running, punching, and listening to music. Single use 4 hours With charging box Use extended to 12 hours The storage box is also a charging box, which is our all-weather solution for you Not only can the headset be protected and stored ,but the headset can be charged twice more You can also charge the headset twice more. AirDots hidden skills: Summon AI voice assistant, find a mobile phone, Open navigation, send WeChat, take a photo You can navigate to the navigation by double-clicking any of the headset multi-function keys to wake up the voice assistant. You can focus on driving and the route has already been planned for you. Have a meal with a friend, or you can reach the destination in advance via the voice assistant WeChat friend. Binding for the first time 1. Take out two headphones and automatically start up 2. Refresh the mobile phone Bluetooth device, pairing Redmi AirDots_R left ear does not need to be equipped separately automatic connection How to reset the headset 1. Press and hold the multi-function button for 15 seconds until the red and white lights flash alternately 3 times for the second time. Off, device reset is successful 2. In the list of Bluetooth devices on your phone, ignore or unpair Redmi AirDots_R, Delete the connection record and complete the reset Noted:Put the earphone back to the charging box and turn it on ,then it will automatically disconnect,when the earphone is turned off ,it will automatically connect back Brand Xiaomi Redmi SKU 100800350_NP-1021288531