Specifications:Voltage: DC 12V Probe: Water-drop Shape ProbeDisplay: C / FModes: Heating Control / Cooling ControlLoad Power: 2000WTemperature Measurement: -50C ~ 120C / -58F ~ 248FTemperature Control: -45C ~ 110C / -49F ~ 230FTemperature Control Return Difference: 1C ~ 30CTemperature Compensation: -15C ~ 15CDelay Time: 0-5 MinutesTiming Shutdown: 10-1440 Minutes(24 Hours)Probe Connecting Wire: Max. 100mAlarm Function: YesItem Size: 85 * 70 * 58mm / 3.35 * 2.75 * 2.28inItem Weight: 126g / 4.4oz Features:Digital guide rail one way temperature controller.Two working modes: heating control and cooling control. Temperature unit switchable: C or F.Adopt NTC thermistor probe, and can use ordinary wire to lengthen up to 100m.Standard industrial guide rail design, quick and easy for mounting. Widely applicable to various of heating/cooling control situations.Setting Modes:P-1: Temperature Control Setting;P-2: Return Difference Value Setting;P-3: Temperature Compensation Setting;P-4: Delay Time Setting(Timing Unit: 1s);P-5: Timing Shutdown Setting(Timing Unit: 10 min.).