- 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
CJ Air tube radiation free bluetooth headset
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 | at 400Hz and 1kHz less 5% |
Speech to noise ratio | morethan58dB |
2.Horn
Sensitivity | 114±5Db SPL/3Mw/5cm at 1KH |
Range of frequency | 20Hz—20KHz |
Resistance | 32Ohm±15% |
Rated power | 3mW |
Capacity | 5mW |
Lead wire length | 1-1.5m |
Comparison with phones with no earphones
Data above shows that FC radiation proof earphones can reduce radiation by 2640 times!
Comparison with common and Bluetooth earphones
Data above shows that FC radiation proof earphones are 52.5 times less radiant than common ones and 16.5 times less than Bluetooth
Specifications above can be made as customers require.Specification All technical parameter can meet or exceed national standards
Patent Number granted by Germany: 20 2006 011 911.6, Patent Number of invention in China: ZL 2005 20042628.4PCT International Publication No.: WO 2010/043097A1
CJ Air tube radiation free bluetooth headset
