Jayfi JA40 Earphones, in-Ear Metal Earbuds, Stereo Bass Isolating Headphones with Mic 9.2mm dynamic unit: 9.2mm dynamic speaker systems with powerful neodymium magnets ensure outstanding sonic accuracy and clarity. Full metal housing: It is more corrosion-resistant, anti-aging, solider and durable than traditional metal headphones; special alloy can transmit HD sound with great improved effect. It can spread the sound signal as far as possible to the ear; it is very suitable for electronic music, DJ and heavy metal rock music. Powerful bass: with combinations of overall Shaping We improved the sound quality of the bass and hafiz through the tuning process; we maximize the bass effect. Clear and authentic sound reproduction is perfect right down to the last detail; The special conductive alloy housing, The unique design of cavity and the excellent dynamic unit enhance its HD sound significantly. Remote control compatible system: Android Windows phone iOS, chrome plated Plug, let the 3.5mm Plug to be more durable. 1 year . If there is any defect or fault in the product, please contact us to receive a free replacement.