Features:
1) Built in stereo headphones with detachable cord.
2) The headphones are detachable, convenient for beanie washing.
3) Non battery required, plug and play
4) Compatible with all MP3 players,iPods, iPhone and all mobile phones

Specifications:
1) Rated Power: RMS 10mW x 2
2) Speaker Unit: 32Ω/30mm
3) Frequency Response:20HZ—20KHZ
4) Audio Input: Universal 3.5mm Audio Jack
5) Power Supply: No power required, plug and play
6) Beanie Material: 60% Acrylic + 40% Polyester
7) Accessories: 1 Pair Detachable Headphone, 1.2M Detachable Audio Cable (with Volume Controller), Microphone Audio Cable is Optional