Designed to be a backup earbud kit, this product features foam earpieces with a 3.5mm male jack to plug into your helmet. Designed to be a backup earbud kit, this product features foam earpieces with a 3.5mm male jack to plug into your helmet. Designed to be a backup earbud kit, this product features foam earpieces with a 3.5mm male jack to plug into your helmet. Designed to be a backup earbud kit, this product features foam earpieces with a 3.5mm male jack to plug into your helmet.