Nanjing Frentec Co., Ltd is a professional manufacturer of interactive whiteboard, such as portable interactive whiteboard, projector interactive whiteboard, ultra short focus interactive whiteboard etc. Our factory passed ISO9001, and now we are supplying for many world famous companies. This kind of Interactive stylus e-pen is our new invention, no need batteries, just get the power from USB, and it's Economic And Environmental Nature. It is can be suitable for any kinds of portable interactive whiteboard,Very convenient to use for teaching, training etc.its price also very good!