Music is a super companion for humans， which can make you relaxing and enjoy colorful life.The BYZ K30 is the best one for you， which is stylish and high-performance headset and is characterized by echo cancellation and noise cancellation technology， high-performance speaker &amp; built-in Microphone. BYZ K30 offers you wonderful music and clear communication， you can greatly enjoy your favorite Music， a super companion for you during daily life and travel. <br><br><strong>BYZ K30 Features: </strong><br>[High-performance Speaker &amp; Microphone]<br>Equipped with 9mm Speaker &amp;High-grade microphone， employs echo cancellation and noise cancellation technology， offering you wonderful music and clear communication. <br>[Super Sport Headphone]<br>Specially designed for sports (jogging， traveling， hiking， etc.)， secure wearing way， lightweight and compact portable size， comfortable to wear it without oppressive feeling. <br>[Enjoy Music &amp; Call]<br>Professional headset， perfect for listening to music， answering incoming call， etc.<br>[Comfortable to wear]<br>*Earmuffs with soft and skin-friendly leatherette has great permeability and is comfortable to wear， and can greatly insulate the sounds around you.<br>[Fully Compatible]<br>*High-quality 3.5mm plug is compatible with any music device using 3.5mm port such as， for iPhone 6 6Plus 5S 5 Samsung， Smart Phones， Desktop， Notebook， Player， MP3 / MP4， cell phone， tablet， etc.<br><br><strong>Specifications: </strong><br>Brand Name: BYZ<br>Model Number: K30<br>Speaker Diameter: 8mm <br>Frequency Range: 20Hz ~20，000Hz<br>Sensitivity: 93±3dB (at 1KHz 1mW)<br>Microphone Sensitivity: -42dB±3dB<br>Impedance: 16Ω±15%<br>Connecting Plug: 3.5mm Audio Plug         <br>Headphone Color: Black， White (Optional)<br>Cable length: 120cm / 47.2in<br>Headphone weight: Approx. 16g / 0.59oz<br>Package size: 16.0 * 9.0 * 3.0cm / 6.29 * 3.54 * 1.18in<br>Package weight: 60g / 2.12oz<br><br><strong>Package List:</strong><br>1 * BYZ K30 Headphone<br>2 * Pair of Earplug