1 .Prolonged use doesn't cause FLAC fatigue.

2 The product is lightweight design: a slim (easy to handle) design . Currently on the market there are several 3D stereoscopic pen, but they are not very comfortable to use i.e bulky, heavy weight, is not conducive to hold control operation. We believe that the design is the closest you can get to USER-Friendly requirements and anti fatigue. Meet the needs of children , students and adults.

3 Control: . For some of the design and operation of three-dimensional defects pen on the market , we believe our pen provides users to operate when arbitrary. Unfortunately, however, the current products on the market , have no speed control function , or have a simple switch for speed dial , or even just the speed control switch as an ornament, no practical purpose. Even if there is a file with a speed dial , you must advance or use your other hand to control . You lose the true meaning of the design. We have had practice and exploration and after much research our design includes added variable speed feature, you can freely control it according to the hand speed , allowing users in the creation of real time three-dimensional painting done most practically and with ease.