Version availbale
V2.0: interactive response, voting, exam, quiz 

Specification
Dimension(mm)	139*58*18
Weight(g)	100
Key buttons	21
Distance(m)	100
Display screen	LCD
Response confirmation	Yes
Communication method	Two-way RF
Software support	PowerPoint
Batteries	2 "AA"
Changeable Device ID	Yes
Device ID range	1~180
Scalable Firmware	Yes
Number	0~9
Character	A~Z
	a~z

General specification of system:
2.4GHz 2-way digital RF technology.
LCD screen display with right/wrong feedback capability
Up to 100 meter range and 180 audiences within 1second for one receiver.
USB receiver
360 degree signal transmission
English and Simple Chinese version for choice.
Third part software support such as PowerPoint, easy to install and use.
Question options include: single choice, multiple choice, sequencing, rating scale, yes/no, numeric (including fractions, decimals and mixed expressions), fill blank, voting, quiz and exam..
Powerful statistics function, convenient for teacher currently, general evaluation.
Stability system, compatibility, it is better combine use with blank board.
Be suitable for varies teaching material.
2pcs of AA batteries
Battery life more than 1 year 4 hours a day.

Beijing Joshare Science & Tech Co., Ltd is a company combining with research, produce and trade together. Joshare is concerning on developing wireless communication, contains four departments: Goods of things Dept. --- this dept is focusing on developing and application; Education Dept. --- they are focusing on the wireless interactive teaching system application in education area and developing; Intelligent home appliance dept. --- which is concentrated on developing and researching intelligent home solution products, Including home temperature, humidity, home energy conservation, home environmental protection and long-range intelligent control. HVAC intelligent Dept. --- this department is focusing on researching and developing calculate and control centre heating and separated heating. Research Dept. of Joshare is leading by Doctor and Master, and many experienced technicians, have closed cooperated with Haier, Beijing University, Hanwang and many educational facilities. Also have two years relationship with Smart, have many intellectual property rights. Concentrate achieves profession; Quality makes brilliant; Creation drives overfly. This is spirit of Joshare and insistence.</p>