1,One-step pairing, you can use the earbuds without any skills. Take out the 2 earbuds from the charging box, they will automatically connect, and then enter the Bluetooth settings of the phone to pair the earbuds. 2,With Bluetooth 3 technology, when the headset is fully charged, you can get 3‑4 hours of continuous playback time. The charging case with a built‑in 600mAh battery can provide multiple charges for the earbuds. 3,The Wireless headset is sweat‑proof, waterproof and rain‑proof. Ergonomic in‑ear design, they are not easy to fall from the ears and stay firm, very suitable for sports, running, driving, exercise, travel, etc. 4,Unbelievable stereo music quality, extraordinary listening experience, strong bass and extraordinary details, obtain unparalleled sound quality and call clarity, stable and reliable call quality. 5,Noise reduction technology can reduce environmental noise, ensuring that you will not lose any part of the rhythm and enjoy music anytime, anywhere. Very suitable as a birthday or business gift. 1 Pair x Headphone1 x Charging Cable1 x Charging Box4 x Ear Cap1 x Manual Item Type: Wireless EarbudsMaterial: ABSBluetooth Version: 5.3Power Input: DC 5VCharging Interface: Type-CBuilt-In Battery in Charging Compartment: Polymer Lithium Battery Built-in Battery Capacity: 3.7V or 600mAhHeadphone Built-In Battery: Polymer Lithium Battery Built-in Battery Capacity: 40mAhTalk or Play Time: About 4.5hSupport Protocol: HSP or HFP or A2DP or AVRCPSensitivity: 120and-5dB Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.