Please look at the pictures. I took a picture of each page of the User manual.

This product is a pack of two wireless presenters with hyperlink volume control and presentation clicker capabilities. The remote control has a wireless range of more than 10 meters and features a pointer for easy navigation. It is designed in a sleek black color and is compatible with universal brands and models. Made in China, this unit is a convenient tool for controlling presentations and volume levels wirelessly.