System RequirementsWindows-based computer   Windows® XP, Windows Vista®   USB portPackage Contents   Logitech® Wireless Presenter R400   Wireless mini-receiver   2 AAA batteries   Carrying case   Quick-start guideTechnical SpecificationsDimensions (height x width x depth):   1.49 in (37.8 mm) x 4.55 in (115.5 mm) x 1.08 in (27.4 mm) Weight:    2.01 oz (57 g) Receiver Dimensions (height x width x depth):   0.65 in (16.5 mm) x 2.31 in (58.6 mm) x 0.31 in (7.9 mm) Receiver Weight:    0.21 oz (6 g) Color:    Black Laser Class:    Class 2 Laser Max Output:    Less than 1mW Wave Length:    640? 1/2 660nm (red light) Battery type:    2 AAA batteries Battery life (Laser pointer):    20-hour maximum Battery life (Presenter):    1050-hour maximum Wireless operating distance:    Approx 10m* Wireless technology:    2.4GH? 1/2 wireless technology Supported OS:   Windows Vista, Windows 7, Windows 8 Interface:    USB Accessories:    Carring case Product Origin China    * It may vary based on use and computing conditions.