Professional earbuds with audio technology, provide a of realistic sound enjoyment. Enables perfect call and stereo sound even in a noisy environment. Compact size, portable and light in weight, easy to carry, store and use. Features - Color: Black. - Material: PC. - Size: 8.00X5.10X3.50cm/3.14X2.00X1.38in. - Machine warehouse power: 400mah - Headphone battery: 35mah - Life time: 4-5 hours - Transmission distance: 10m - Speaker type: 13mm - Microphone: microphone - Version: 5.1 second generation - Frequency response: 20Hz-2.48GHz - Standby time: about 120H - Headphone impedance: 32 - Sensitivity: 103dB - Wake-up time: 1.5 seconds - Design: 13mm real copper ring - Delay: 0.045 seconds - Pick out headphones of the charging case to pair within seconds, up and listen. - Can be separated, can be combined, listen to music melody together with others, enjoy . - appearance design, -transmitting dots on the topper of the earphone design, very ornamental. - Note: It is forbidden to charge this product for a long time with fast charging or high-current chargers! - workmanship, reasonable structure, professional and practical, can bring you convenience. Package list: 1 x Charging Compartment 2 x Earphones 1 x USB 1 x Manual