the specs of voting systems  IR118 as below

General specs

Deatil of specs 

1. Patent IR technology
2. Two-way technology, never jam, never lost
3. High Speed - 100 audience keypads transmission < ONE second   (similar products may require 5 seconds or more).
4. Super-Wide-angle signal transmission > 280 degrees angle
5. ID number changeable (compare to the obsolete ID setting mode of similar products), No need to keep a large stock of student remote. (For resellers)
6. Up to 20 meters transmission and reception distance
7. Support cascade and uplink option
8. Support up to 400 audience keypads (enhance version)
9. Easy to install, easy to use
10. Plug-in software of MS PowerPoint
11. Support self-paced answering.
12. Multifunctional instructor remote
13. USB port or 232 port connection for choose
14. Third party software supportable

About software

1. 11 language versions: Chinese simple, Chinese traditional, English, Portuguese, Spanish, Brazilian Portuguese,Slovenian,Russian, Turkish, Hungarian and Korean. 
2. PowerPoint plug-in, easy to learn and use, for the PowerPoint is familiar to many people.
3. Provides 10 kinds of activity-models for interactive teaching and meeting
4. Professional statistics analysis engine, automatically produce 10 kinds of reports tracking and recording the process of the activities
5. Colorful and multiform multimedia questions
6. Flexible data transformation, analysis results can be presented in html and txt formats.
7. Statistics data can be exported as xls format.
8. Prompt diagnosis of teaching effectiveness and improve teaching process
9. Supports oral, blackboard or paper-based questions.
10. Auto-recognize function, no need transform of the used PPT slides.
11. Auto-setting question and options.