Air Tube Open Earphones and Innovative Design Unique air tube open earphone design, brings an unusual experience. The sound produced by the earphone drive unit is transmitted to the ear through a stereo duct. It greatly enhances the sound effect and brings a better listening experience. This Bluetooth headset comes with a 300mAh charging box, which can play for 5-7 hours on a single charge, and the total playback time of 2 earbuds is about 36 hoursAutomatic Pairing and Noise Cancelling Earbuds When you remove the wireless earbuds from the charging box, it will automatically turn on and pair automatically. After the two earbuds are paired successfully, you can use the mobile phone Bluetooth to connect the earbuds. After the first Bluetooth connection, the earbuds will automatically connect to Bluetooth after removing the battery box.Touch Control and Language Change This wireless Bluetooth headset is controlled by touch. Click the left earbud to lower the volume, and click the right earbud to increase the volume. Click twice to pause or play music, and click twice to answer or close the call. Click the left earbud three times to play the previous song, and click the right earbud three times to play the next song. Language change: Cancel or turn off the headset Bluetooth connection on your phone, then quickly touch the headset twice to change the language.Excellent sound quality and clear calls The music output is high-definition stereo audio, which creates a premium listening environment, and thanks to the noise reduction technology, the sound is very clear without any noise. The headset has a microphone, you can use it to make calls, and you can hear very clear voices.