Thermostat Temperature Controller Elitech STC-1000 main functions as below: Switch the modes between cool and heat; Control temperature by setting the temperature setting value and the difference value; Temperature calibration; Refrigerating control output delay protection; Alarm when the temperature exceeds temperature limit or when sensor error occurs. Technical Parameters : Temperature measuring range: -50℃~99℃; Resolution: 0.1℃; Accuracy: ±1℃ (-50℃~70℃); Sensor error delay: 1 minute Power supply: 110 VAC±10%, 50/60Hz; Power consumption: less than 3W; Sensor: NTC sensor (1PC); Relay contact capacity: Cool 10A/110VAC;Heat 10A/110VAC; Ambient temperature: 0~60℃; Storage temperature: -30~75℃; Relative humidity: 20%~85% (No condensate). Specification: Front panel size: 75(L)×34.5(W)mm; Mounting size: 71(L)×29(W)mm; Product size: 75(L)×34.5(W)×85(D)mm; sensor length 2 m included; Measure range: -50℃+99℃ Mounting size: 71*29 mm Auto switch between refrigerating and heating Return difference value Package Includes: 1 x STC-1000 Thermostat Temperature Controller Aquarium (Elitech)