Leading Bluetooth V5.3 Technology and One-Step Auto Pairing: Adopting advanced Bluetooth 5.3, wireless earbud support HSP HFP A2DP AVRCP, which offer you an unparalleled audio experience with faster transmission speed, stronger connection stability, and longer range of bluetooth. Taken from the charging case, bluetooth headphones will be paired with each other automatically, and just hitting on bluetooth list i13 on your device to connect. In a matter of seconds, you are in euphonic music world. Dual LED Power Display and Upgraded 40H Playback: Dual LED power display on the case can help check the charging status of wireless headphones and charging case. Earbud wireless bluetooth can get 8 hours play back from a single charge. Lightweight charging case supports 4 times of recharging for wireless earphones, gives up to 40 hours continuous music time. The Type-C charging port can provide faster and safer charging. Take it to travel with you, you can enjoy long-lasting music every day. Stereo Deep Bass and Clear Call: Wireless earphones adopt with DSR lossless HD rendering technology and equip with premium 13mm dynamic driver-the drive area is 4 times than the normal drive area, making the bass punchier and midrange full and textured, treble crystal crisp. Large chamber acoustic design well balances the internal and external air pressure to avoid sound loss, bluetooth earphones are combined ENC noise cancelling mic ensuring you can be heard clearly even in noisy environment. Ultralight and Comfort Fit: The pocket-sized charging case does not take up any space to carry, and you will not have any stress on wearing Sports earbud. Earbud wireless headphones are designed to fit the contours of the human ear with a curved structure that is same to the shape of the ear canal, making them comfortable to wear and not falling out when running, gym. Headphones bluetooth use IP7 nano-coating technology, which can protect internal components from liquids and ensure a longer life Smart Touch Control and Wide Compatibility: Features with touch control sensors, headphones wireless bluetooth allows you to conveniently power on/off, play/pause, skip songs, answer/hang up, adjust volume, activate Siri and access other functions at the touch of a button. Free your hands completely when you’re busy doing exercise, driving or running. Wireless bluetooth headphones are Compatible with most Bluetooth-enabled devices including ios or Android smartphones, TV, computer, Laptop etc,.