dk-speaker.com.tw
DK SIGNAL - horn speaker, PA, siren speakers, driver unit, digital surveillance, loudspeakersDK Signal, a 30-year old Taiwan manufacturer, specialized in driver unit, high Power Speakers, horn Speakers, siren speakers, PA loudspeakers for communication, security equipment and warning systems for police and military enforcement, industrial and municipal facilities.
http://dk-speaker.com.tw/