Huion Non-Rechargeable Stylus Pen for GT-190/GT-220 Tablet Monitor - GT-P68 Can be used on Huion GT-190, GT-185HD, GT-220 Pen Display Tablet Monitor; Does NOT compatible with smaller Huion drawing tablets(H610 Pro, 580, 420 etc.) Needs an AAA battery to operate. Easy to use, has two definable buttons on it. Light weight, comfortable to hold with. Technology: Electromagnetic Digitizer