Switch the modes between cool and heat;Control temperature setting the temperature setting value and the difference value; Temperature calibration; Refrigerating control output delay protection; Alarm when temperature exceeds, temperature limit or when sensor error.Sensor length:1m(include the probe) Temperature measuring range:-50℃~99℃ Resolution:0.1℃ Accuracy:± 0.1℃(-50℃~70℃) sensor error delay:1 minute Power supply:110-220VAC±10%,50/60Hz Power consumption:Less than 3W Sensor: sensor(1PC) Relay contact capacity:Cool(10A/250VAC);Heat(10A/250VAC) Ambient temperature:O℃~60℃ Storage temperature:-30℃-75℃ Relative humidity:20~85%(No condensate) Different batches may have different contents on the back sticker. Colour:As Shown Material:plastic Package Contents: 1X 110-220V Digital Temperature Controller 1X English manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.