High school classroom educational language lab

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Product Overview


Product Description

High school classroom educational language lab

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Topological Graph


Product Pictures

Data Switch 


Student’s Terminal

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Software Interface

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System Advantages


1. CAT5 network cable guarantees the power supplying, data switch, communication control and VGA transmission.


2. Digital audio switch uses the standard USB2.0 interface connected with the master computer.


3. High speed digital audio mix& transmission capacity makes the voice delay less than 1 ms.


4. Advanced semiconductor embedded(DSP) technology to make the system highly integrated, simple and stable.


5. Low-carbon, environmentally friendly, energy-saving.




1. 5 inch LED display


2. One student uses one terminal. Monitor is optional


3. Standard keyboard & mouse interfaces


4. High quality audio & video & text on demand


5. Simultaneous


6. Keeping the same tune while changing voice speed

Main Functions



Audio Broadcasting

Teacher can broadcast his voice or other audio material to  a single or all students

Video Broadcasting

Teacher can broadcast his video material to all students

Screen Broadcasting

Teacher can broadcast his screen to the student

Screen Monitor

Teacher can monitor or observe selected student’s work or view their screen

Dialogue /Voice Intercom

Teacher can dialogue to single, selected or all students

Group Discussion

Teacher can divide the students to any group for discussion randomly

Job Submission

Student can transfer his homework to the teacher’s computer

Digital Courseware

Record the teacher’s speech or student’s practice to teacher’s Hard Disk. When necessary, teacher can export the file for comparison

Record and Repeat

Teacher or student can record their voice then listen to or repeat their voices for better pronunciation and intonation.

Online Cinema

Teacher can broadcast VCD/DVD in his computer and transfer to the student’s screen


Teacher can edit words or questions on the whiteboard during teacher

E-responder/ Call

Teacher can arrange the students to race to be the first one to answer the question



Student can select audio learning resource and broadcast in his own terminal. The terminal support WAV, MP3, WMA, RA, OGG, AC3, APE, AIF and also on demand AVI, WMV, RM, RMVB, MPEG, ASF, MOV (audio part).


Student can select text learning resource and broadcast in his own terminal. The turning speed can be set by the teacher or adjust by the student themselves.

IP Telephone

Student can speak to any online classmate randomly

Variable speed playback

Student can change the speed of audio material

Synchronous playback of

sound &  text

The sound and text can be broadcast synchronously

Simultaneous Interpretation

Teacher can select 1 to 12 students to interpret simultaneously and transfer their voice to other students. The audience also can select the interpreter.

Keyboard input

Standard mouse and keyboard input


Independent Examination and Assessment

Student can choose the paper from the resource library and the system will help to evaluate

Mode of papers sent

Support A-B examination, random examination, oral examination and writing examination

Student answers

Student can answer questions on the paper

Paper Edit

Teacher can edit paper for the students


Remote Control

Teacher can control or operate student’s terminal directly

Black Silence

Teacher can lock single, part or all students’ screen to call them to concentrate on the class

System Setting

Set the system

Electronic roll call

When teacher sent the roll call command, student’s information like name, class etc. will be showed on the teacher’s interface


Equipment Composition(For 30 seats)





QUANITTY (pc/pcs)

Teacher’s Side

Teacher's PC


Digital Audio-Video Data Switch


System Software


Teacher's Headphone


Teacher's Table


Teacher's Chair


Student Side




Student Terminal


Display Screen




Student Table


Student Chair


Company Information

Greelan Technology

Shaanxi Greelan Technology Development Co., Ltd has been providing digital language learning system, lab equipment and lab software since 2003. Our products are widely used in the schools and universities throughout the world with certificates FCC, CE, ISO9001, ISO18001, CCC etc. Till now, we have got 12 hardware patents and 4 software copyrights. GREELAN aims to help people learning language easier and happier.

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Packaging & Shipping

Packing: plastic bag with foam inside and cartons outside

a. Teacher’s terminal: 1pc per carton / carton size 51*37.5*34.5cm

b. Student’s terminal: 16pcs per carton/ carton size 56*48*35cm

c. Headphone: 40pcs per carton/ carton size 59*44*46cm

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Shipping: By express, by air or by sea

Our Services

1. One Stop Service

a. Pre-sales: make a comprehensive project plan for customer.

b. After-sales: offer customer service whenever you have a question.


2. Advanced Technology

a. Hardware: less equipment to make the connection easy and save the cost.

b. Software: simple, practical and multifunctional.


3. High Standard Quality Control

a. Strict inspection during the production.

b. Careful test of every equipment before shipping.


4. Fast and timely delivery

a. Product preparation: 7-10 days.

b. Delivery: timely delivery once the goods are ready.


1. Sample Time: 2-3 days


2. Delivery Time: 7-10 days after deposit


3. Payment Term: T/T, L/C, West Union

Just send me a message and you will know  everything.
Whatsapp/Skype/Wechat: +86 151292046482

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