Wireless bone conduction earphones, designed for clear TV audio. - Brand: DenDen - Type: Bone conduction earphones - Accessories: Charger, USB cable, instruction manual - Color: Black - Features: Wireless connection Thank you for viewing. Product: DenDen Bone Conduction Wireless Headphones with Sound Collector DEN-HEADH The sound collected by the sound collector is transmitted directly to the inner ear via bone conduction from the pads of the 'DenDen' unit (bone conduction headphones) without going through the eardrum, so even those with hearing difficulties can clearly hear the sound. Stored at home. The item has been opened once for content confirmation and photography, but it is unused. Since it is a new, unused item, the operation is unknown. Please understand. Wireless Bluetooth earphones headphones sound collector hearing loss