1)Interface:RF 2.4GHz 2)Control Distance: Up to 10 meters 3)Laser Distance: Up to 200 meters 4)Trackball Resolution: Up to 400 DpI 5)Working Voltage: 3V (Presenter) 6)Max output: <1mW(Class ii) or <5mW(Class iii)(optional) 7)Power consumption: Working mode <100mA Sleep mode <10uA 8)Wavelength: 650nm 9)Battery:AAA x 2(included) 10)Dimension:125 x 51 x 47mm 11)Weight without batteries: 55g 12)Reciver - Interface : USB - Operation system: Windows 98/Se, Me, 2000,XP,Vista,Mac OS, Linux Compatible plug: USB1.1 USB2.0 - Working voltage: 4.5-5.5V (USB) - Power consumption: <45mA - Dimensions: 73 x 26 x 14 mm. 13)Note: To avoid possible eye damage, never point the presenter at people especially their faces, or look directly into the presenter’s laser beam. Be sure to read the user’s manual carefully before use.