Automatic connection 1.Take out R and L earbuds from the case, and they will automatically enter into pairing mode (flash blue). 2.Active bluetooth-enabled device and search for other bluetooth device. 3.Select ''TWS-880'' from the list of bluetooth devices shown. 4.How to reset the device? Take out the earphones from the charging case.tap and hold the multi-funcation touch control for 5 seconds to switch off the device(lights off). Hold both the earphone multi-funcation touch control for 20 seconds. Note: The left earbud and the right earbud are the that can be used alone. IPX7 100% Waterproof 27-Hour Uninterrupted PlayTime 33t Wireless Distance Range Bluetooth 5.0 HiFi Stereo Sound Smart Touch Control True Wireless Headphones ULTRA-STABLE CONNECTION Adopt the newest Bluetooth 5.0 chipset with high resolution decoder built-in and AAC/CVC audio coding technology to deliver extraordinary Hi-Fi sound with low latency. DuoTen works flawlessly at a distance up to 33 ft (10m). HiFi Deep Bass Sound Adopting Bluetooth 5.0 HD rendering technology that produce incredible sound quality with deep bass and crystal crisp treble. built in high quality noise reduction technology chip, can block out lots of surrounding noises during running, sports, jogging etc. IPX7 Waterproof IPX7 Waterproof Nano-coating efficiently prevents water and sweat from penetrating and damaging its sensitive component. Working properly for workouts in the sun or songs in the rain. Perfect for running, swimming, jogging, hiking, yoga, exercises, gym, fitness, travelling and etc. Note: The charging case is not waterproof. Smart Touch Control Completely release your hands, Adopt the latest 5.0 bluetooth chip, enable you to adjust the volume and play the previous/next track by the wireless earbuds when you do sports, no longer to control the phone anymore. Smart Switch Between Twin & Single Mode Both the Left and Right earbud can work separately. You can switch to single and twin mode freely. Note: If there is only one side, you can try the following method. Up to 6 Hrs Continuous Playtime With the latest Class 1 Bluetooth technology, you can get TWICE the playtime of normal earbuds – up to 6 hours continuous playtime and 27 hours with charging case for one charge.