General Specs:

About the hardware:

1.  Dimensions of LCD : 32mm * 21mm
2. 2.4GHz digital RF technology
3.  128*64 dot matrix LCD display
4.  120 character input
5.  Transmission distance: > 100 meters
6.  Transmission angle: 360 degrees
7.  Dimensions of handset: 52.8 mm * 14.5mm *116mm 
8.  Power: two AAA 1.5 volt batteries (Alkaline batteries are recommended for longer battery life)
9.  Battery life:  1 to 2 years with ordinary usage
10.  Built-in battery status check to electrical quantity check and display
11.  64 sets of systems can works well at the same classroom at the same time
12.  Up to 2000 handsets can be used at the same time with one receiver
13. Weight:Receiver:0.175kg;Instructor remote: 0.045 kg; Students remote: 0.045 kg

About the software:

1. Works with XP, Vista, and Windows 7 and compatible with PPT 2003,2007 and 2010
2.  Complete text input functions. Keypad handles alphabet, standard punctuation, numbers and symbols. Familiar mobile phone keypad layout
3.  Integrated with PowerPoint. Uses standard PowerPoint commands and icons to build questions and operate PowerPoint slides.
4.  Provides 11 Activity modules to handle a wide range of classroom activities
5.  Supports self-paced-response so the student handsets can be used to administer paper-based tests and check in homework
6.  Supports multi-correct answer options (e.g. “The correct answer is A and C” in a multiple choice question.)
7.  Address programmable handsets make it easy to assign any handset to any student and save classroom time.
8.  Instant messaging function allows interactive messaging between teacher and students
9.  Question, polling and voting options: The RF219 software provides great flexibility and options in asking different types of questions and answers. The options are:

*Text question mode

* For/Against/Abstain voting mode

*True/False question mode

*Yes/No question mode

*Multiple choice question mode

*Sort – in – order question mode

*Digital question mode (special and convenient fraction input)

*Questions with certain number of options

*Category question mode

1.  Special ItsMe^sm audience-checking program displays pictures of the each student to help teachers remember student names, and reduces the risk of cheating in large classrooms.