Feature: 1. LED displays the measured temperature value, clear, intuitive, not affected by light. 2. You can control both heating and cooling output, built‑in panel, 220VAC direct power supply, easy to install. 3. There is an alarm indicating sensor failure or high temperature, stable and Reliable. 4. Highly accurate and reliable temperature controller measuring temperature range wide, 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: ZFX - 900 Input Voltage: 220V Measuring Accuracy: 1℃ Temperature Measurement Display Range: -50-110 degrees Celsius Sensor: NTC ◆ Panel Size: Approx. 31x64mm / 1.2x2.5in ◆ Hole Size: Approx. 25.7x58.4mm / 1.0x2.3in . Package List: 1 x Temperature Display Panel Note: The red wire is connected to the positive pole of the power supply, and the black wire is connected to the negative pole of the power supply.