Shanghai Zhongchangjiang Telecommunication Technology Co., Ltd.
Products
Contact Us
  • Contact Person : Ms. Zhao Mayling
  • Company Name : Shanghai Zhongchangjiang Telecommunication Technology Co., Ltd.
  • Tel : 86-021-58226122
  • Fax : 86-021-68221183
  • Address : Shanghai,Shanghai,No.5829 Hunan Road Pudong New area, Shanghai
  • Country/Region : China
  • Zip : 201316

Earphone&headphone

Earphone&headphone
Product Detailed
Related Categories:Telephone Headsets
1:FC radiation-proofing earphones can reduce radiation by 2640 times than phones. 2:Our product was patented in Germany.

       Ear plugs of FC Changjiang radiation-proofing earphones are far away from loud speakers with 200-300mm acoustic lines to separate loud speaker magnetism and radiation source. Common earphones’ loud speakers are in earplugs. Radiation through conductor will be absorbed by brain; 1000Gs permanent magnet in ear plugs is harmful for our brain.

       Ear plugs of FC Changjiang radiation-proofing earphones are connected with phones by an anti electromagnetic wave acoustic channel. We can produce radiation magnetic field to under 2mG which has no harm to human body.

       Operating phone calls by switch board in earphones is to keep us a certain distance from phones.

       FC Changjiang radiation-proofing earphones cannot be used as aerial line for signal receiving to avoid radiation caused by aerial line.

       • New generic Universal 3.5mm/USB plug which can be made as required

       • n-Ear Stereo& Mono Headset

       • Modals FC01 FC02 FC03 FC04 

       • Colors White, black, red, blue

       • Includes integrated earpieces and microphone

       • Excellent sound quality and super clear sound.

       • Length: 145 cm (57 inch)

1.Electret condenser microphone

Offset

4.5VDC        2.2Kilohm

Sensitivity

—42±3dB f=1KHz,spL=1Pa

Directivity

omni directional

Static impedance

1—2.2 Kilohm

Peak voltage

10VDC

Distortion

Speech to noise ratio

at 400Hz and 1kHz less 5%

more than 58dB

2.Horn

Sensitivity

 

114±5Db SPL/3Mw/5cm at 1KHz

 

Rangeoffrequency

 

20Hz—20KHz

 

Resistance

 

32Ohm±15%

 

Rated power

 

3mW

 

Capacity

 

5mW

 

Lead wire length

 

1-1.5m

 

Earphone&headphone



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