Dimensions: 22.2 x 14.2 x 7mm Transmitter Technology: Radio Frequency. Frequency: 2.4GHz. Control distance: 100m II. Class maximum output: 200m. Wavelength: 532nm. Battery: 400mAh. Polymer lithium battery operating voltage: 3.7V~4.2V. Dimensions: 133 x 27 x 13.3mm. Weight: 46g USB. Receiver OS: For Windows 2003, XP, Vista, For Windows 7/8/10, For Mac OS, For Linux. Description: Aluminum alloy body, matte texture, delicate and smooth bright green laser pointer can be easily seen on any presentation screen, and can support hyperlinks even in brightly lit rooms. It also combines flip-up, flip-down, slideshow, PPT presentation black screen and more functions wireless presenter, equipped with top microchip, wireless range up to 100 meters. Operates on the 2.4G RF frequency, which is an ISM-free frequency and is available worldwide. It's made of nickel-plated metal dome and silicone keyboard, giving you a comfortable touch support page up, page down, full screen, black screen, press and hold the page up button to full screen or exit. Press and hold the Page Down button to black out or exit the mini USB receiver supports plug and play technology. No drivers required Built-in docking station stores USB receivers for easy packing and portability, one USB receiver can be controlled by six transmitters simultaneously.