Feature: 1. PID ADJUSTMENT: The PID algorithm restores the measured speed to the desired value with minimal delay and overshoot by increasing the power output of the transformer. 2. HIGH PERFORMANCE: The thermostat circuit board has the characteristics of high wiring density, high accuracy and small size, which is easy to operate with less interference. 3. EASY OPERATION: The controller can digitally control the temperature, with high accuracy and sensitivity, and the operation is convenient and intuitive. 4. LED DISPLAY: The intelligent temperature controller adopts 7 stage LED display (PV: red, SV: green), with relay alarm output, efficient and durable. 5. MULTIPLE USAGES: Suitable for machine tool equipment, heating equipment, boiler equipment, temperature control equipment, automation equipment, etc. Specification: Item Type: Digital Smart Thermostat Material: PC Allowable Voltage Range: 90%~110% of rated voltage Output Current: 4-20MA Rated Voltage: 100-240VAC Display Method: 7 Stage LED (PV: Red, SV: Green) Panel Size(W x H): Approx. 48 x 96mm / 1.9 x 3.8in Character Size: PV(W x H): Approx. 7 x 14.6mm / 0.3 x 0.6in SV(W x H): Approx. 6 x 12mm / 0.2 x 0.5in Control Accuracy: 1~100℃/0.1~50.0℃ Control Mode: ON OFF, P, PI, PD, PID control Alarm Output: AL1, AL2 Relay, 250VAC 1A. Package List: 1 x Thermostat2 x Accessories1 x User Manual Note: Please pay attention to electricity safety when using it.