classroom wireless hidden microphones for teacher audio/sound system

1,bluetooth transmitter 2,handheld type or usb headset 3,page turner:page up/down 4,laser pointer,MP3 play 5,LCD diplay classroom wireless microphones for teacher This model microphone is a bluetooth transmitter,we desined for teachers comfort,who can hang on his neckand do gesture to his classes.or speak by the inbuilt mic or headset mic; It has many many functions which is the perfect for teacher use !Function:1.Multichannels:It has more than 1000 channels.2.Compatibility:The same transmitter can be used on different receiver.

3.MIC type:Built-in MIC design,eliminating the line.

4.Size:Staff of a small size, easy to use.

5. LCD display power supply,low battery,signal link,volume and so on.

6. Remote electronic laser pointer,page turner, USB upgrading.

7. Pen designed,instead of any other MIC.

8.Lithium Battery Environmental protection. :3.7V/900mA

9. It can work for 30 hours,standby time :60 days.

For handsfree convenience, the 1090 with pendant type microphone If both hands free is what you need, this 

microphone is perfect. 2.4GHz emitter, microphone and processor are combined in this all-in-one unit, for revolutionary, cable-free convenience.

More specifications:

Transmitter(Holding)

  Frequency Scope: 2.4~2.483GHz  Frequency Response Scope: 50Hz~15KHz  Modulation Type: GFSK,BT=0.5Gaussian  Transmitting Power: 2.5mW  Linking Mode: ID Coding, Auto-link locking  Data Transmitting: Two-way 2.4G frequency-hopping (FH)  Linking Time: <3 Seconds  Sensitivity: -85dBm(1%BER)  Signal-to-Noise Ratio:≥80dB  Working Current: 30mA  Working hours: 30hours

  Standby time: 60days  Working Voltage: 3.7V Alkaline battery  Working Distance: ≤80 meters  Working Temperature: -30-50°C  Weight: 45G  Dimension: 95.5*33.5*18(mm)

classroom wireless hidden microphones for teacher audio/sound system