* The double-color stylus pen continuously writes 5 kilometers in a straight line under a load of 500g, with a pen tip loss of no more than 1mm. The data comes from the TYALUX laboratory.
* The double-color stylus pen continuously writes 5 kilometers in a straight line under a load of 500g, with a pen tip loss of no more than 1mm. The data comes from the TYALUX laboratory.