- These Goji earbuds' Bluetooth technology and automatic connection make pairing a breeze- With two built-in microphones in each earbud, you can enjoy crystal-clear calls- Environmental Noise Cancellation (ENC) technology keeps background noise to a minimum- Easily manage your audio playback and calls with the intuitive touch controls- Enjoy up to four hours of continuous playback on a single charge, plus an extra 12 hours from the charging case- Switch between Sound EQ modes - Vocal, Equal and Bass - to customise it so it's just the way you like it