Perfect for classroom instruction, lectures, training, speeches, and other PPT display scenarios. incredibly useful and convenient to use, supporting volume control, page up, page down, black screen, full screen, play slides, etc. The presenter pen has the ability to store a USB receiver with a magnetic suction design. with a bright red light that makes it easy to see the user's face and most backgrounds. One * AAA battery (battery version only) powers it. Rechargeable 180mAh built-in battery eliminates the need to replace batteries, making it more cost-effective and ecologically friendly (charging version only). HP Standard Limited Warranty for one year.