Features: The bright digital tube is clearly displayed, and it can be clearly read whether it is used during the day or at night. Switch the modes cool and heat, control temperature by setting the temperature set value and the different value. Temperature calibration, refrigeration control output delay protection,alarm when temperature exceeds temperature limit or when sensor error. Specifications: Temperature Control Range: -50 to 99 degree centigrade Resolution: 0.1 Control Accuracy: +/- 0.1 degree centigrade Sensor: NTC 10K L = 1M waterproof probe Power consumption: <3W Power supply: AC110V-220V Relay contact capacity: Cool(10A/220VAC), heat(10A/220VAC) Ambient temperature: 0- 60 Storage temperature: -30-75 Relative humidity: 20-84% Size: 2.76 x 1.06 x 3.35inches Front Panel Size: 1.34 x 2.95inches Sensor length: 1m(include the probe) Package Includes: 1 x Digital Temperature Controller 1 x Instruction Manual Warm Notes: Manual measurement, please allow slight errors on size. The colors may exist slight difference due to different screens.