It is suggested to use greater than 6mm diameter pen tip. 

Stylus/ Passive pen with conductive cloth material will work with all ViewSonic’s Projected Capacitive touch monitors (TD1630/TD2230/TD2430, TD2455/TD1655, TD2760).   

Pen tip with 8mm diameter is better for TD2230.

Note:

1. TD2455 and TD1655 stylus/passive pen (Included in the box) will also work with TD1630/TD2430/TD2760. 

2. Every touch panel pixel is different and cover glasses will affect capacitance sensing, passive pen touch sensitivity and touch accuracy. 

3. Stylus/passive pen will not have pressure sensor and palm rejection function.