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:110-220VAC10%,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.