Note：Please read the following instructions when purchasing Bluetooth headsets:1. Due to long-term transportation, the power of headphones will be exhausted. After receiving the package, if you can't use the headset normally, you can turn it off. The first thing to do is to charge the headset box for 30 minutes. Very important!! thank you2. Please pay attention! There is no charging cable in the original package. If necessary, you need to buy it yourself!!!3. This headset is true Mi basic wireless headset 2, which is the global version of Xiaomi redmi airdots 2after-sale service：If you find the quantity does not match the purchase quantity after receiving the express, or there are other quality problems, please do not open it easily, and contact our after-sales customer service to solve it in time. Thank you for your support and understanding!Basic earplugs:Real Bluetooth wireless headset, Bluetooth 5.0, automatic connection, fast connection, can be used with headset1 and 2 switches -- - (New)Switch mode seamlessly for one or two ears.Bluetooth 5.0Next generation Bluetooth technology enables faster and more stable connectionsComfortable to wear, freely adjustable, not easy to fall off12 hours long battery lifeWith loading box, brush 6 layers of filmVoice control:Call voice assistant, voice control mobile phone1. Take out two headphones, and the headphones will turn on automatically.2. Update the Bluetooth device of the mobile phone, and then click redmi airdots to connect * put the headset back into the charging box, the headset lights up red, and then automatically disconnect, remove the headset and clear the white, and then automatically connect back.How do I reset the headset?1. Press and hold the multifunction key for 15 seconds until the red light and white light flash alternately for 3 times and go out, and the device is reset successfully;2. Ignore or cancel the redmi airdots in the Bluetooth device list of the paired mobile phone, delete the connection log and complete the recovery.Standard packagingHeadphones / charging box x 1/ silicone earplugs x 3 pairs (s, m and L) / user manual x 1If you have any dissatisfaction with the product, please contact customer service first, do not file a dispute easily, otherwise you will not be refunded, hope to understand!