TPM 900 Digital Temperature Controller LED Panel with Sensor for 220V Refrigeration Cabinets 1. LED displays the measured temperature value, clear, intuitive, without the influence of light.2. You can control both heating and cooling power, built-in panel, 220VAC direct power supply, easy to install.3. There is an alarm to indicate sensor failure or high temperature, stable and reliable.4. Highly accurate and reliable temperature controller temperature measurement wide range, high accuracy.5. Made of premium ABS material, strong and durable, long service life, convenient to operate. Specification: Item type: Temperature display panel Material: ABS Model: TPM - 900 Input voltage: 220V Measurement accuracy: 0.1 Temperature measurement range: -50-110 degrees Celsius Sensor: NTC Panel Size: Approx. 31 x 64mm/1.2 x 2.5in Hole Size: Approx. 25.7 x 58.4mm/1.0 x 2.3in Package List: 1 x Temperature Display Panel Note: The red wire is connected to the positive pole of the power supply, and the black the wire is connected to the negative pole of the power supply.