Controller and purpose: Mini digital thermostat for heating and cooling control with a range of 55 to 120 C. It supports both cooling and heating modes and automatically activates based on the setpoint to maintain a constant environment. Ideal for industrial or laboratory applications. Digital display and input: Clear 3digit display shows realtime readings with 0.℃ resolution and measurement accuracy, refreshing every 0.5 seconds for a responsive readout. Compatible with a 1 m 10K0.5% metal waterproof probe for reliable input performance. Miniature design and installation: Compact size of 79 x 43 x 26 mm with a panel opening of 76 x 39 mm. This small footprint fits tight spaces easily and integrates into machinery or equipment, offering a spacesaving control solution for business and industrial setups. Safety protection and calibration: Set upper and lower limits to avoid overheating or overcooling. Alarms trigger when or low thresholds are reached. Includes a calibration function for adjustment to ensure long lasting and stable operation. Practical use scenarios: Laboratory and industrial environments requiring precise temperature control in compact equipment or enclosures. Small to medium scale machinery where space is limited but reliable temperature management is needed. Storage or processing areas for temperaturesensitive items such as reagents, electronics, or small instruments. Key attributes at a glance: function for heating and cooling control, compatibility with a 1 m metal waterproof probe, compact dimensions for tight installations, panel mount with a 76 x 39 mm opening, realtime 3digit display with 0.℃ resolution, and adjustable upper and lower limits with calibration for stable, longterm use.