All the High Trigger Sensitivity Infrared Pen on Sale are equipped with Tallpic’s patented Omni-direction-trigger technology, which makes the touch-trigger sensitive and reliable. Both battery powered and chargeable models are provided. Among the chargeable models, the Tallpic’s supper-capacitor powered stylus e-pens are very remarkable in unlimited charging life cycle, short charging time, pollution free, and airmail safety. All the Tallpic e-pen nibs are made of self-lubricating and wear-resisting material, which makes them endurable and smooth when applied to any surface.