They work fine for a while, but there are two main problems: The silver cone at the bottom breaks off for some reason, which defeats the purpose of the pen. Also, the rubber tip doesn't do a good job when typing or scrolling. It just slips or is pushed and nothing happens. It takes more pushing and a few tries to get it working. But I think you get what you pay for.
Enhance Your Visual Experience with Logitech C260 Webcam
78 Review
π» Get Amazing Video Quality with Logitech HD Pro Webcam C920 (Discontinued Edition)
83 Review
π₯ Logitech C270 Webcam: Crystal Clear Video and Superior Quality
183 Review
Sennheiser PC 8 2 Cancelling Microphone
71 Review