Pencil Type Wireless Microphone

La description

The type of wireless microphone system is designed for modern school,especially suitable for occasion of multi-classrooms(about *0)and several teachers.When each classroom provide one wireless receiver,any teacher with wireless microphone can teach in any classroom,it is available when starting up.The system is widely welcomed for its features of easy to use,convenient to carry,clear sound,environmental USB charger,prevent infection.
 
system features：
1.advanced blue-tooth 2.4GHz digital Wireless automatic recognition technology of frequency   
A.wide range of auto frequency range:more than ***0m(Stationary state without obstacle) B.support multiple transmission modes of point to point and point to multiple-point,support to limitless quantity of receiving terminal.
C.easy to avoid disturb frequency:use blue-tooth ISM of 2.4GHz frequency range,is able to meet the need of multiple-frequency and frequency hopping;system will auto-select the new frequency point when it occurs strong disturb to avoid the disturb frequency.
D.rapid target frequency,available when starting up.
E.LCD on wireless receiver will show RF signal when successfully target frequency. F.It is available for any teacher with pencil type wireless microphone in any classroom with wireless receiver;
2.high sound quality
When successful target frequency,the working frequency is the same between receiver and pencil type wireless microphone,system will auto-transform to analog signal work which ensure the sound quality by original,to make sure the receive signal in hi-fi wide frequency response.avoid the fault of direct adoption of ISM of 2.4GHz(as:signal easy to receive by substance,easy to lose the line,easy to disturb by wireless LAN etc)
3.USB environmental charger interface
4.ultra low power consumption, more power saving：
Dry battery working time is about ***0 hours.NI-MH chargeable battery working time is **8 hours.
5.ultra lightweight pencil type design：
Length of **5MM(includes USB charge interface **0MM),diameter*4.*7MM,weight of *2G.
6. gain optional：
0dB for hand-held using,9dB used for clip or hanging in front of the chest
7.**0 auto-select frequency channels without disturb：
User can pre-set channels on LCD of receiver,pencil type wireless microphone will auto-select to target frequency when power on.
 
 
System index：
target frequencyï¼›2.4G
frequency range：******5MHz
adjust method：FM
adjustable range：*0MHz wideband
Frequency channels：**0
interval：**0 KHz
Frequency stability：within ±0.**5%
dynamic range：*0dB
Maximum deviation：±*5KHZ
Audio response：*0HZ**2KHz (±3dB)
comprehensive noise rate：>*5dB
comprehensive distortion：≤0.5%
Working temperature：**0℃~**0℃
Operation distance：*0 meter,auto-target frequency distance:3 meter(wide space)
 
Receiver index：
receiver method：The two frequency heterodyne
middle frequency：the first middle frequency：**0MHz,the second middle frequency:*0.7MHz
Wireless interface：BNC/*0 ohm
sensitivity：*2 dBµV (*0dBS/N)
sensitivity adjust range：****2 dBµV
Spurious suppression：≥*5dB
Maximum output intensity：**0DBV
 
pencil type wireless microphone index：
Target frequencyï¼›2.4G
wireless pattern：adopts 1/4 wave length,built-in screw antenna,output power:high power *0mW
Spurious suppression：**0dB
Power supply：1 AAA dry battery or chargeable battery
battery working hours：dry batter:***0 hours. NI-MH chargeable battery:6－8 hours
Charge method：MINI USB charging,able to charge by PC