for various interactive classrooms from K-12 to high education,with self-paced test, homework function Features: S31 Classical white & black color, it can meet various question types: blank filling, number-entering, grading, sequence, fast... - Update: 2011-12-06

credit-card size,super light & slim Advanced two-way 2.4G radio frequency, with 2X CR2032 cell batteries,fatest finger questions M52 Technical Specification V1.0 1,Appearance l Rugged ABS plastic construction,beautiful and decent, credit-car... - Update: 2011-12-06

Smart, simple-use, popular Advanced two-way 2.4G radio frequency technology,portable design with 2AA ordinary batter, good price Features: l Advanced two-way 2.4G radio frequency (RF) technology l 6 alphanumeric keys design, easy-to-use, ... - Update: 2011-12-06

PVS-W52 personal response system, super light & slim design, easy to use and carry, 14 keys suit for interactive training etc. Features: W52 l Super light & slim design, easy to use and carry l Advanced two-way 2.4G radio frequency (RF)... - Update: 2011-12-06

super light & slim design, easy to use and carry, 14 keys for interactive training and audience response in company and schools Features: PVS-W52 l Super light & slim design, easy to use and carry l Advanced two-way 2.4G radio frequency... - Update: 2011-12-06