Feature: 1. Using intelligent PID control method, high accuracy, easy and simple to operate 2. Removable shell design, simple detachable shell, convenient for maintenance and installation 3. With flame retardant shell, high conductivity silver contacts are safe and stable, and have a long service life 4. High accuracy chip adopts SMT chip technology, high sensitivity, stable and dependable, accurate temperature measurement 5. Suitable for detecting temperature. Specification: Item Type: PID Thermostat Model: REX-C100FK02-M x DA Material: Plastic Purpose: Used to detect temperature Panel Size: Approx. 48 x 48mm / 1.9 x 1.9in Hole Size: Approx. 45 x 45mm / 1.8 x 1.8in Operating Voltage: 220VAC, 50Hz/60Hz Temperature Range: 1~999(℃) Note: The factory setting value of the product is 400℃ (adjustable up to 999) Temperature Control Accuracy: 1.0 Control Method: PID control and self-tuning control Working Environment: 0-50℃ relative humidity 30%~85%RH Input Method: K type Output Mode: Relay(RELAY) . Package List: 1 x Thermostat2 x User Manual