Custom Ethernet Optical Transceiver Module , Optical Fiber Module GLC-EX-SM Cisco GLC-EX-SM Cisco GLC-EX-SM Specifications Features: 1.25G Data Transfer Rate Hot-pluggable SFP footprint Digital Diagnostic Monitoring 1550nm DFB laser and PIN photodetector Duplex LC connector Reach Up to 80km Single 3.3 V power supply Low power dissipationlt, 700mW Operating temperature: 0-70в„ѓ Ordering infomation: PN DESCRIBTION WS-G5484 1000BASE-SX Short Wavelength GBIC (Multimode only) WS-G5484 1000BASE-SX Short Wavelength GBIC (Multimode only) WS-G5486 1000BASE-LX/LH long haul GBIC (singlemode or multimode) WS-G5487 1000Base-ZX extended reach GBIC(singlemode) X2-10GB-LR 10GBASE-LR X2 Module X2-10GB-SR 10GBASE-SR X2 Module Competitive advantage: 1. Excellent quality and 1 years warranty 2. Competitive pricing 3. Original Package 4. Original Label 5. Keep stock,Fast delivery One year warranty: All of our Cisco products with one year manufacture warranty or smartnet free for you buying smartnet at you local Cisco. Pictures for reference: