... 2, Aluminum case 3, Time and temperature display alternately 4, CE, FCC, RoHS 5, Power over Ethernet Key ... Installation: Surface.l Certification: CE / FC/RoHS Physical SpecificationDisplay: 4” 4digit, 7-segment red LEDViewing Distance: 50 metersDimensions: 31CM ... 12VDCTime Synchronization: SNTPCertifications: CE/ FCC/ RoHSConfiguration by Software. 4" Temperature and time control with Aluminum case