The Koss Porta PRO Wireless takes the legendary sound and the iconic design of the classic; Koss Porta Pro headphones wireless with Bluetooth 4.1 with aptX. It offers 12+ hour battery life, an in-line microphone & a remote for taking calls and controlling music. The Koss Design and Engineering teams collaborated to create the perfect wireless The Porta Pro Wireless retails for $80 in the US (UK and Australia prices have not yet been set) and the wired 'Pro is $50, £34 or AU$80. Both headphones fold and collapse into small bundles to ^{sound pressure level. 99dB/mW. 111dB/mW. Devices with a higher sound pressure level are generally louder when supplied with any given audio source. has a neodymium magnet. Audio-Technica ATH-M50x. Koss Porta Pro Wireless. Devices with neodymium magnets are lighter and more powerful than those which use ferrite magnets. Koss Porta Pro Wireless Bluetooth On-Ear Headphones, in-Line Microphone, Volume Control and Touch Remote, Adjustable Headband with Multi-Pivoting Ear Plates, Black 4.3 out of 5 stars 1,123 3 offers from $67.77} Koss Porta Pro Wireless. ราคา: $ 79.99. บรรทัดล่าง: Porta Pro Wireless ของ Koss รีไซเคิลการออกแบบในปี 1984 ในปี 2018 และใช้งานได้เป็นส่วนใหญ่ ขอบคุณด้วยเสียงที่น่า uBUdgqh.