| LCD display 4 radios channels 11 Activity modules Support Self-Paced-Response Support Multi-Correct-Options ID Address Programmable Power required: two 1.5 volt batteries (alkalescent battery will be better) Transmission distance: > 100 meters Transmission angle: 360 degree Battery life: > 1 to 2 years for ordinary useother Product name CPS student response system audience feedback audience response system china classroom clickers classroom response system china clickers clickers audience response system electronic voting systems interactive audience polling interactive audience response interactive audience response systems wireless audience response system wireless voting systems audience response system audience response systems classroom performance system classroom performance systemsclassroom response system student response systems | 
