1. [One-click operation, free to use] - This function is based on the air mouse presenter technology. In PPT or WPS presentations, press the marker key and move the mouse to take notes. 2. [RF technology, free presentation] - This function is based on the air mouse presenter technology. In PPT or WPS presentations, press the marker key and move the mouse to take notes. 3. [Plug and play] - The mini receiver saves space on the computer's USB port. It has an integrated design for easy carrying. 4. [Widely applicable] - Supported systems for PPT remote control: Windows 7/8/10, Mac OS; Supported software for presenter remote control: PowerPoint, Google Slides, Prezi, Keynote, Numbers, etc.; Also applicable to PDF, Word, Excel, ACD See, websites, etc. Specifications: 1. Applicable systems: Android, Windows, Mac OS, Linux 2. Remote control distance: 100 meters 3. Battery: 360 mAh polymer lithium battery 4. Operating voltage: 3.6 - 4.2 volts 5. Output power: Less than 12 milliwatts 6. Laser wavelength: 650 nanometers (red light) 7. Laser distance: 200 meters 8. Transmission frequency: 2.4 GHz 9. Color: Black 10. Material: Plastic 11. Dimensions: Approximately 140×19×19.5 mm Package contents: 1. 1 presenter 2. 1 receiver 3. 1 charging cable 4. 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 slightly from the actual product. A measurement error of ±1 - 3 cm is allowed.