The S size is the CTL-4100 model with Bluetooth wireless functionality. It does not have a box. I will also include an unused screen protector for the S size. The M size was purchased on Amazon in November 2025. This one is wired only, so please be careful not to get them mixed up. This one comes with the box. I used copy paper on both of them when drawing. There are about 6 spare pen nibs in total.