For the SB600 and SB500 Series only. 

SALES ON ALL PRODUCTS from Smart Technologies, Inc. are final! NO RETURNS OR EXCHANGES WILL BE ACCEPTED 

 Each SMART interactive product comes with one or more pens specifically designed for that product, which you can use to write or draw in digital ink. Using a pen from  different SMART product can cause unexpected behavior, such as broken digital ink lines or intermittent contact detection. For this reason, it is important to use pens designed for your SMART product.