... the same time. 2.4 digits led display. HA series 0.8" LED Alarm Hygrometer Feaures: 1, Input:dual line displaying temperature and ... ,output +12 or 5V/30mA.4, Full 4 digit display,range: -1999~9999,one demical precision.5, Communication:RS232 ... manufacture thousands of different models of products, including Temperature Controller, Digital Adjustor,thermocouple (TC and RTD), Panel Meter, Sensor Meter, ...