Specifications: With 3 keys Interface: USBPS/2 DPI resolution ratio: 800 Transmission model and line of 1.5m Compatibility PS/2 for all types of computers system USB for windows 98 system and the later version Non-standard Size: (L) 108 x (W) 55 x (H) 35mm Advantages: Bamboo is one kind of biodegradable materials, it is benefiting human environment New fashion consumer electronics product with quality of being beautiful and delicate in appearance Good practicability, material would adjust to the season’s temperature Warm in winter, while cool in summer Good sensory and also can defend static Bamboo grain also do well in absorbing ultraviolet light Soft and warm color of bamboo can relax visual fatigue High level practical products as well as a very decorative effect of health artwork