We, KD, are specialist of manufacturing Electronic Sign Board using Light Emitting Diode (LED). And the product ranges are Notice Board , LED Video Display Board, Advertising Billboard, Traffic Information Board, Moving Message Board, Gymnasium Score Board, Baseball Pitcher Display Board, etc. And their installation, part supply and services, by OEM/ODM with any design and specifications, The Electronic Buzzer is another product of KD since 1991.The Buzzer has been delivered to well known Motorola, Pentak, Hanhwa and numbers of mobile phone & appliances makers in Korea and overseas. Recently KD developed world smallest and lightest Buzzer for marketing in the telecommunication field.