Easy connection, just plug the receiver into a USB port. The receiver can be stored in the main unit for easy portability. Intuitive and comfortable operability is achieved with easy-to-feel buttons and a smooth form that fits in your hand. Laser Class: Class 2 Laser Stable connection with 2.4GHz wireless technology. Red laser pointer with intuitive slideshow controls. Operating Distance: Approximately 10m (※Varies depending on the usage environment and conditions) There is a sticky feeling due to aging, but there is no problem with the function. Please consider this if you are concerned.