A. Automatic pairing upon power - on in version 1.5.0: Simplify the process. Just pair the earphones with your phone without much trouble. B. One - touch operation to replace pressing: It can be used for answering and hanging up calls, playing and pausing music, turning the earphones on and off, adjusting the volume, waking up Siri voice, etc. C. Wireless without much burden: Equipped with a Bluetooth 5.0 chip, the CVC8.0 noise - reduction function can offer sound effects comparable to some other earphones. D. Purely present the natural sounds: Let your ears enjoy the layered content such as music, movies, and calls with high - frequency sound effects. E. One - key operation to avoid complexity: Functions like turning the earphones on and off are easy to operate. You can have control over music playback and call management. Transmission range: 10 meters Bluetooth protocol: 5.0 Usage method: In - ear type Single - ear or dual - ear: Dual - channel stereo Battery life: 0 - 4 hours Waterproof performance: IPX3 Color: Black + Red Material: Plastic Dimensions: 50 x 35 x 15 mm Package contents: - 2 pairs of earphones - 1 earphone charging case - 1 English instruction manual Only the above items are included in the package, and no other products are provided. Note: Light reflection and different displays may cause slight differences between the colors of the items in the pictures and the actual products. A measurement error of +/- 1 - 3 cm is allowed.