1Environmentally friendly ABS plastics; Scientific ergonomic design; A plug-and-play wireless receiver; Wireless Technology: 2.4 GHz; 2Easy to use: just plug into the USB, the light on the USB is flashing light ,you already plug in the battery and press the switch on button, the USB light will become solid light and then the laser can normally light when you hold on the button, the brig 3Wireless remote control distance range of up to 39-foot, so you can free to move around the room and interact with your audience 4Support options: With page up and page down buttom, supports MS Word, Excel, PowerPoint, ACD See, website, iWork (Keynote & Numbers & Pages) etc; For MacBook on OS, plug the usb receiver into laptop, it will come out a box, and then you can select 101or1 5Buttons: light pointer, display of black screen, next, previous, full screen, on/off switch; One-touch keys easy to control slideshow; About pointer: hold down the button to keep the light onLaser Pointer Clicker Features:A plug-and-play wireless receiver,there's no software to install.No hassle setup,simply plug into your computer's USB port.Buttons having quick access to different functions are easy to find by touch.Transmitter Features:Switch: ButtonMaterial: ABS Battery Power: Build in powerful lithium batterySize: 130x33x15mm/5.1x1.3x0.6inch (Approx.)Control Distance: 20m (The effective distance will change with the surrounding environment)Receiver Features:Material: ABSSupported OS: Win7,Win8,Win10,MAC OS,LinuxWarranty:3 years warranty; You can get another USB receiver if you need it within 2 years (for someone who lost the USB receiver in daily life).