New Products, buy Greelan Education Lab for learning language on China Suppliers Mobile

Product Details

Product Description

GD Series Features
1	Set up is Simple and convenient,no need to renovation the classroom, lines are easy to install and arranged, low carbon and Eco.
2	The displayer may install and fixed on the desk, to avoid students move the displayer here and there so you won’t take time to arrange the displayers.
3	Students' digital language terminals are all installed on the desk, there will be a box on the desk to arrange the circuit to pretect the lines and students could not touch the circuit which will be very safe,also loooks very tidy.
4	Headphone is designed with crystal interface, easy to modify and no need to change the headphone,the line is soft and durable,easy to connect and maintain, the tone is very clear.
5	Desk design is Safe and simple,We can produce the desk as customers requests, and our design will make the installing lines are mostly hide in the desk with a box, so the students couldn’t tough the line or be hurt from the lines.
6	Lines, as our design are adopt with USB 2.0 interface, so our machines just need several data line with USB 2.0 interface, don’t need you to set video line, sound line, network line or other such lines, too many lines will be very complex to set up and manage,
7	The system support difference languages, and the English system is more popular.
8	Heat dissipation is low, adopt aluminium sheet to radiating, low heat without noisy, much better than radiator.
Functions
Teaching functions	Audio broadcasting
	Video broadcast
	Screen broadcast
	Screen monitor
	online cinema
	Voice talk back
	Group discussion
	Electronic whiteboard
	Job Submission
	Electronic responder
	Make digital courseware
	Electronic hands
Self-learning functions	Audio on demand
	Text on demand
	IP phone
	Electronic dictionary
	Change speed without tune changed play
	Voice and text synchronous playback
	Read and following the record
	Automatic leading read in both Chinese and English
	Simultaneous translation
	Learning exchange
	Independent exam and evaluation
	Digital exam mode and test paper sending
	Students' answer
	produce examination paper
Management functions	Remote control
	Black screen silence
	Lock teacher’s computer
	System settings
	Student’s headphone automatically detection
	Remote mandatory management
	Support network
	Network control
	Monitor
	Electronic attendance
	Personalized teaching settings
Equipment technical parameter table
Category	Technical Index
System reliability	1.Mean time between failures: Master device controller/student units,10000 hours, system halted and lost connection≤1;
	2.Terminal starting success one time rate is 100%;
	3.Working condition:-10-45°C;relative humidity 20%-80%;barometric pressure 86-106Kpa;Power system alternating voltage is 220V±22V;mains frequency:50±2.5Hz.
	128 pcs 44.1Khz/16bit audio data transmission at the same time
The digital audio switch	Electrical connection: standard power is 220V±22V,output voltage is 9V,intelligent switch, all the power of student terminal are supplied by the audio hosted exchange.
	SNR ( Signal to Noise Ratio )>80dB,Distortion rate <1%.
	Four-in-one network output interface(including power supply,data switch,communication control HD VGA signal),
Digital student terminal	1.Stepless speed-change without tonal modification range:50%-+200%.
	2.SNR ( Signal to Noise Ratio )>80dB
	3.Frequency response:125Hz-10.0kHz(±2dB), more than 16 bit linear sampling.
	4.Recording session ≥600 minutes;
	5.Directly drive VGA color LCD screen displayer.
	6.Four-in-one network interface(including power, data switch,communication control HD VGA signal),VGA signal output interface(optional)
Headphone with microphone(2-channel stereo)	Headphone:
	a) Frequency response: 125Hz~8000 Hz, ±17 dB(0dB=20uPa)(input power =1mW)
	b) Impedance: 32Ω±20%;
	c) Characteristics of sound pressure level(sensitivity):≥100dB/1mW (0dB=20uPa).
	Microphone:
	a) Frequency response:40-20000HZ
	b) Type: electret microphone;
	c) Free field sensitivity:-47±2 dB(0 dB=1V/Pa);
	d) Directional type; bidirectional.
Sound delay	1.Broadcast≤1ms;
	2.Talkback≤1ms;
	3.Breakdown time: Nope.
Network	1.Adopt the multi-channel digital audio real-time packet transmission protocol.
Network	2.Four-in-one network pattern, audio and video switch supply power, data transmission,transmit data & HD VGA signal.