... blue back light! Without any display fault!3. New printing Interface of USB 2.0, quick, convenient, stable, with ... Temperature: 15C-35C, Relatuive humidity: 10%-70% (no-condensation state)Store ConditionTemperature: -21C-60C Relatuive humidity: 10%-70% ( ... no-condensation state)Display LanguageEnglish,Chinese,Korean,Japanese,French,German,Spanish,Italian,portuguese ...