Headphone Koss The Plug Wireless Noise Isolating Mic 196982.102. Excellent sound isolation thanks to the original design of the headphones - you are left alone with the music. Foam ear cushions heat up from body heat to form into the shape of the ear canal. Koss The Plug's excellent sound isolation and maximum comfort are now available wirelessly. Koss The Plug Wireless in-ear headphones support Bluetooth version 4.2 technology. The built-in lithium-ion battery allows you to listen to your favorite music for up to 6 hours on a single charge.
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