The control earphone is convenient and practical, with excellent texture, and can serve you for a long time without being easily . The craftsmanship can serve you well without breaking easily. This is a very practical earphone. 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 - Gives you a when pairing and connecting to your device. - Perfect for gym, workout, running, driving, travelling, airplane and most of the places. - A charging case is included, providing a convenient charging way with attached. - Ensure the most stable connectivity, fast transmission without signal loss or music . - It is perfect for hands-free phone calling or listening to music that provides the wonderful stereo call and audio quality and clarity. Package list: 1 x Charging Compartment 2 x Earphones 1 x USB 1 x Manual