550m SFP module is a Telecommunications product. Key specs — Origin: China; Price Term: FOB.
Product Description
 Small size, LC/SCdual-port, metal shielding model, high anti-interference
2. Support with Electric hot-pluggable, optical modules the main directionof development.
3. Match and be 100% compatible with the equipments and SFP of Cisco,H3C,  huaweiHP,Nortel,Dlink,3COM,etc.
4. ISO9000, UL,TUV, CE, FDA,FCC and RoHS certificates
etailed description
Products Features
Compliant with SFP Transceiver MSA&SFF-8472 specifications with internal calibration
Compliant with FE/GBE/2GBE/FC/2FC/4FC/SDH/SONET
Compliant with Industry Standard RFT Electrical Connector and Cage
Compliant with Telcordia (Bellcore) GR-468-CORE
Class 1 Laser Product compliant with Requirements of IEC 60825-1 and IEC 60825-2
Single+3.3V power supply and TTLL logic interface up to4.25Gb/s bi-directional data link 850/1310/1550nm VCSEL/FP/DFB,SM/MM Fiber Optional
Hot-Pluggable,Duplex LC Connector
EEPROM with Serial ID Funvtionality
Operating temperature from 0-+70,--40-+85 available
Low EMI
RoHs compliant products avaiable
Related Products
DAM 50KW Digital WM AM Broadcasting Transmitter
DAM 10KW Digital MW AM Broadcasting Transmitter
3kW All-Solid-State FM Stereo Broadcasting Transmitter
5kW All-Solid-State FM Stereo Broadcasting Transmitter
China (Mainland) D848 Advanced Hybrid Key Telephone Systems
Taiwan Unihone Digital Key Telephone System
Telephone Monitor Recorder
Ws824 Group Phone System (China (Mainland))