... response system, interactive learning response system PH-1100 Voting System is a new generation audience response system. ... audience can give their answers immediately. PH-1100 voting system is particularly suitable for teachers wishing to ... use Specification:TechnologyRadio FrequencyFunctionLaser pointer, Page up/down, Wireless nouse, Hotkeys, Teaching modeControl distance30m/98 feetDimensionL=12. ...