1, long-life LED, life up to 100,000 hours; 2, flexible metal bellows can be made full direction, adjust the angle of rotation, free bending without clips, adhesive and other fixing methods, flexible and convenient! 3, small size, light weight, easy to carry, very easily into a briefcase or folders; 4, eliminating the need for external power supply, USB to take power directly from the Insert; 5, softly illuminated keyboard and will not affect other people around;