Key Features Bone conduction vibrators -- Patent pending; Bone conduction helps prevent hearing loss and improve hearing function; Dynamic sound quality and tones and high clarity of sound; Directly transmit sound to auditory organs, ideal for language and online studies, listening to music etc; Not use ears any more, instead keeping them open and free to maintain situational awareness; Novel human-body engineering design, comfortable even for long term use; New style stereo headset; Anion (minus ion) effect at the skin-contacting surfaces for better health; Compatible with iPod, CD, MD, MP3 players etc; Position-adjustable and rotatable speakers from temple to on-the-ear position for best output depending on surrounding conditions; Foldable for easy carrying and storage, pouch included Specifications Two colors available: Black and white Type: Stereo Bone Conduction Headset Normal output: 30 mW Max output：70 mW Impedance：10Ω Sound pressure sensitivity：95dB/mW（dB1.0dyne） Cord length：120 cm Plug： Stereo φ3.5 mm Weight: 60g New environment-friendly packaging materials used 1 year manufacturer warranty Please contact for detailed information