Plasma Disc Clock is a new product patented in China. Size is 22.5 cm diameter x 6.5 cm thick. The clock dial is made by 20Cm diameter Plasma Disc that has 17.8 cm diameter display area provide fantastic shining colors lightning such as blue, yellow, white, green red and multi colors, on the surface of clock dial can put logo on it according to customer''s requirement. It''s also with function of reaction sensitivity of sound. The clock dial Plasma Disc it is designed for USB cable, AC/DC adaptor or 4 pieces "AA" battery both can use on it, but batter running about 24hrs only.