... Technology: Radio FrequencyFuncion: Laser pointer, Page up/down, Wireless mouse, Hotkeys, Teaching modeControl Distance: 30m/98feetDimesion: L=12.5cn, W=5 ... can ask a planned answers immediately. PH-1100 Voting System is particularly suitable for teachers wishing to facilitate testing, ... in many forms;4. Wireless control;5. Easy to set-up and use. Voting System,E-voting, Wireless control, PH-1100