Specifications: It has digital display, which is clear and easy to read. Buckle type is convenient for installation. With intelligent PID control, it is much more precise and accurate. Item Name: Temperature Controller Product Model: REX-C100 SSR DN Material: ABS Working Voltage: 100V-240V Temperature Range: 0~999 Degree Celsius Type: Buckle Output Signal: 15±3V/30mA Features: with Digital Display, Intelligent, Durable Size: 10.7cm x 4.8cm x 4.8cm/4.21" x 1.89" x 1.89" (Approx.) Opening Hole Size: 4.4cm x 4.4cm/1.7" x 1.7" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Temperature Controller REX-C100 SSR DN 1 x SSR-40DA Relay 1 x M6 K Type Screw Inch Coarse Thread 1M