STC-1000 STC-3008 Dual Digital Thermostat Temperature Controller Two Relay Output 12V 24V 220V Heating Cooling Control Switch Name Digital Dual Temperature Controller Temperature meauring range -55C~120C Resolution 0.1 Controlling Accuracy 1C Relay contact current 10A/240V AC Temperature Sensor NTC10K Length of cable 1m Power supply DC 12V/110~220V( choose the one you need ) Data Save YES Working temperature 0C~50C Storage Temperature -10C~60C Default P0 : Delay start 0-60 minutes 0 P1 : Delay start 0-60 minutes 0 P2 High temperature alarm P3~120C 120C P3 Low temperature alarm P2~-55C -55C Long pre UP 1 button for 3 seconds, display flashes, pre UP 1 or DOWN 1 button to set the start temperature(25C default) Long pre DOWN 1 button for 3 seconds, the display flashes, pre UP 1 or DOWN 1 button to set the stop temperature (40C default) Long pre UP 2 button for 3 seconds, display flashes, pre UP 2 or DOWN 2 button to set the start temperature(25C default) Long pre DOWN 2 button for 3 seconds, the display flashes, pre UP 2 or DOWN 2 button to set the stop temperature (40C default) Long pre DOWN 1 and DOWN 2 button for 3 seconds to reset the controllers. Heating Mode--Start temperatureStop temperature 1 x Dual Digital Thermostat with Dual Sensors STC-1000 Modes Heating and Cooling Display C High temperature alarm limit setting NO Temperature measuring range -50 C ~ 99 C Return difference Value: 0.3~10.0C Resolution 0.1 C Accuracy +/- 1 C (-50 C ~ 70 C) Power supply 110-220VAC 50/60Hz, 12VDC , 24VDC Power Consumpption