... definition 3.Easy for maintenance 4.Operate easily led temperature and humidity display, date/time displayProduct ... 0-9Character Size6“,8”,12“,16”,20“,24”,28”,32“,36“,40“,48” for choosingDisplay FormatA number ... IP65 Back side: IP55Display AlterationRS232 serial cable and RF wirelessBrightness Adjustment16 Grade Automatic Brightness AdjustmentFrame ColorsBlackFrame MaterialAluminium Alloy ...