A. [One-click operation, free to use] - This function is based on the air mouse presenter technology. In PPT or WPS presentations, pressing the marker key and moving the mouse allows for taking notes. B. [RF technology, free presentation] - This function is based on the air mouse presenter technology. In PPT or WPS presentations, pressing the marker key and moving the mouse enables taking notes. C. [Plug and play] - The mini receiver helps save space on the computer's USB port. It has an integrated design for convenient carrying. D. [Widely applicable] - Supported systems for PPT remote control include Windows 7/8/10, Mac OS; Supported software for presenter remote control are PowerPoint, Google Slides, Prezi, Keynote, Numbers, etc.; It is also applicable to PDF, Word, Excel, ACD See, websites, etc. Specifications: - Applicable systems: Android, Windows, Mac OS, Linux - Remote control distance: Up to 100 meters - Battery: 360 mAh polymer lithium battery - Operating voltage: 3.6 - 4.2 volts - Output power: Less than 12 milliwatts - Laser wavelength: 650 nanometers (red light) - Laser distance: Up to 200 meters - Transmission frequency: 2.4 GHz - Color: Black - Material: Plastic - Dimensions: Approximately 140×19×19.5 mm Package contents: - 1 presenter - 1 receiver - 1 charging cable - 1 instruction manual in both Chinese and English Only the above items are included in the package. Other products are not included. Note: Light and different displays may cause the color of the item to vary somewhat from the actual product. A measurement error of ±1 - 3 cm is permitted.