A great all-in-one device with Red Laser for presentations. Small light weight which fits your hand well. Two hotkey: page up and page down, are very easy to use. Dimension- 4.8" x 1.2" x 0.69" (12.3 x 3.14 x 1.76cm). * Original Designed & Made in Taiwan with a high-quality manufacturing service and outstandingly lower RMA rate than the industrial average for others made in China. Work flawlessly on Mac, Windows. OS supported for Windows XP, 2000, OS Mac 9.0 or later. * Powered by 2 AAA batteries (INCLUDED!!) which is quite convenient and cost effective. Service time up to 8 hours. * Ergonomic design and excellent hand feeling. Is very compact and light in weight (74.2g) & easy to carry and packed in an elegant gift box. It"s elegant & practical gift for the professional who has everything. * Features: Infrared technology. USB connection, plug & play compatible- no PC programming required.