High & Low limit settable function display valuge:0-19999(free value) can set the alarm value Output: relay Digital Meter with High & Low limit settable function Specification:Power supply: AC220V 50HzDigital display: 19999countDisplay color: Red Green BlueOperating temperature: 0~40Relative humidity: 20%~80%Installation method: InlayDimension: (W) 96mm X (H) 48mm X (D) 87mmModel: MB4504Accuracy: ...