Dimension:13*7.5*7.8cm It is our new product and have patent right. This product is especially suitable for using in the auto. It is exquisite, fashion appearance, comfortable feel,and convenient use . it can draw 99% above dust. 1),It can use battery or direct-current power supply 2),It have specail brush . also It is easy to replace. 3), The outer covering uses the ABS engineering plastics,it is reliable and durable.