Features: 1. 2.4GHz wireless presenter pen, with strong red light to easily see most backgrounds and projection surfaces. 2. With up and down buttons, full screen, black screen, convenient for controlling your slideshow. 3. With a USB receiver next to the battery compartment, plug and play, powered by 1*AAA battery (not included). 4. Approx. 15m/59in effective wireless remote communication range, free for you to walk around and interact with your audience. 5. Supports browsing Excel, PowerPoint, web pages, e-books, etc. Specifications: 1. Ergonomic ultra-slim design and compact size give you a comfortable feel. 2. Fantastic assistant for teachers, lecturers, professors, researchers, and other speakers, as well as an ideal thoughtful gift. Specification: Material: Plastic Radio Frequency: 2.4GHz-2.483GHz Power Supply: 1*AAA Battery (not included) Effective Control Distance: Approx. 15 m/59 inches Output Power: <5mW Current: 30mA (max) Package includes: 1*Transmitter 1*USB Receiver