Red laser beam emission USB Pen with USB 2.0 interface, direct plug-and-play with no driver required. System for WINDOWS98/2000/ME/XP Linux Mac OS Remote control distance within 20m Flash memory (optional 512MB, 1GB, 2GB) Page up down 1pc 12V23A battery (not included) Wavelength 650nm Output: under 5mW Gift box for packaging
