... supply, built-in power optionalAc 220 v, dc - 48 v optionalProduct features:Adaptive:With 10/100 m rate adaptive ... 1 aPower consumption: < 5 wBuilt-in power: 220 vac, - 48 VDCPower consumption: < 5 wEnvironmental requirements:Working temperature range: 0 ° ... transmission, such as remote teaching, video conference, PT-20SM-SF;MB electric double mouth single-mode fiber optic transceivers;Optical ...