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HL-3140

Function introduction:

 A、B、C、D、E: Applied to choose the answer
 (3140/3140E) must be numbered by the short circuit device (please check the installation instruction).
 VOL: choose the volume
 PROG: choose multiple program channels
 UP:: go up the text exam question number under the free exam.
 DOWN go down the text exam question number under the free exam.

 CALL: call or race to answer.

2nd Floor,Block D,Xinsheng Industrial Park,Xintang Avenue,Tianhe District,Guangzhou,China. Tel:0086-20-85571786 FAX:0086-20-85578797 e-mail: info@jereducation.com sales2@jereducation.com 

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