Features:  Apply microcomputer technology to keep precise measurement.  Bright LED display, direct and clear to see data.  Dual heating and cooling functions with the icon to indicate.  Freely exchange℃ and ℉.  Can adjust temperature difference and have adjustable output delay function to protect compressor.  Have a water-proof sensor with 1m wire and sucker for better measurement.  Wide temperature testing range: -40℃ to 110℃, temperature control range is 16℃ to 40℃.  With 4 icons: SNOW, SUN, COOL and HEAT to indicate your operation.     Note:  1. In the cooling mode: if the testing temperature is ≥ setting temp. + temp. difference, the cooling process will operate. otherwise, the cooling process will stop. In the heating mode: if the testing temperature is ≥ setting temp. + temp. difference, the heating process will stop. otherwise, it will start.  2. We have the specific instructions in the complimentary user manual.     Specification:  Color: Black.  Temperature Measuring Range: -40℃ to 110℃.  Temperature Control Range: 16℃ to 40℃.  Resolution: 0.1℃.  Accuracy: +/- 1℃.  Sensor: Water-proof NTC Sensor.  Sensor Cable Length: 1.05m.  Input Voltage: 110V (US Plug) / 220V (UK Plug, EU Plug, AU Plug).  Relay: 10A/220V.  Product Consumption: ≤ 3W.  Ambient Requirements: Temperature: -10℃ to 60℃ Humidity: 20% to 85%.  Control Load: 1200W/220V (resistive load).  Item Size: 13.6 * 5.6 * 3.6cm / 5.32 * 2.17 * 1.38in (Main Body).     Package includes:  1 x Thermostat.  1 x User Manual.  1 x Power adapter(according to your country)