Specification:This 2.4 GHz Wireless Remote Red Laser Pointer Presentation Black is small and exquisite， portable and with richer applications. An essential nice assistant of demonstrations or presentations， you can easily point to the PPT or blackboard in any corner of classroom. Making your demonstrations or presentation seem more dynamic and making listeners feel release. This laser pointer is also the best gift for friends and families.No hassle setup， simply plug into your computer¡¯s USB port.Power saving， lightweight， suitable for putting in your pocket or handbags.Supports MS Word， excel， PowerPoint， ACD See， website， etc， with page up and down function.No driver required， just plug and play， simple in operation.Transmitter Features:Color: BlackSwitch: ButtonMaterial: ABSLight Style: Beam lightLaser Color: RedRadio Frequency: 2.4GHzLaser Output Power: <1mwBattery Power: 1 Pcs 1.5v£¨AAA£©Battery (Not Included)Laser Distance: > 300mLaser Wavelength: 650nmSize: 140mm x 26mm x 22mm/5.5'' x 1.02'' x 8.66'' (Approx.)Control Distance: 10m - 15m (The effective distance will change with the surrounding environment)Recevier Features:Color: BlackMaterial: ABSSupported OS: Win 98， Se， Me， 2000， XP， Vista， MAC OS， LinuxInterface: USB1.1， USB2.0Work Voltage: 4.5 - 5.5V (USB Bus-powered)Size: 65mm x 20mm x 11mm/2.56'' x 0.79'' x 0.43'' (Approx.)Package Includes:1 x Wireless Presenter Remote Control (Battery is Not Included)1 x Ultra-Slim Wireless Receiver1 x User Manual