USB led light working voltage:DC5V working current:320mA power : PC/Adapter CE,ROHS are optional USB2.0 standardTechnology with unique ... Linux 2.4.x operating system System requirements:* With USB Interface* Windows 98/Me/2000/XP, Mac OS ... 9.x / X, Linux 2.4.xBeautifully packaged, with lanyards fine, elegant, can do the database, so collectors ... durable, color variety, the texture is good USB led light