in-ear headphones metal Model: RY04 Driver unit:15mm High quality speaker unit Impedance:32Ω±15% Frequency response:20-20000HZ Sensitivity:95dB±3dB Plug type:3.5 mm Cable length:1.2M Mic:No Features: 15mm super powerful speaker, broad sound field, detailed sound effect All metal shell headset . Fashion design, strong sound field structure. For HI FI headphones for the high quality earphone Line: (18 core line X 4 core copper) Apply to: smartphones, iPhone, PC, tablet pc, MP3, CD, PSP Package: (Plastic bag)headphone X 1pcs with mic ver: To my dear friends: We are a young factory, the main production of high quality music headphones, sports key categories of products. You buy the headset, are our own factory production, the factory price of the sale. You have to see the products are all direct real products to take pictures, not 3D effect chart. Although the 3D effect chart is more beautiful, but I think you need a quality product, not a good picture. Our products are made of high quality materials used in headphones, metal shell /TPE cable /18 core copper / metal plug protective sleeve… All of this is just for you to spend less money and buy a better product. China Post Ordinary Small Packet Plus/4PX Singapore Post OM Pro,( only support tracking in china) in this way, it can save your money. If you select China Post Air Mail, then, it is registered mail,you can get the tracking information of your goods. but need more cost, shipping to most of nations is 15 – 45 working days (Russia and Brazil usually 30- 60 working days) If you need tracking service, please choose Air Mail. order’s amount is over 7usd will support tracking service for free. If you did not recieve the goods in 60days,we will 100% refund your payment. thank you for your trust, thank you for positive feedback , you will be our VIP enjoying more surprise and discount.