Compact digital temperature controller for precise heating and cooling in home brewing, aquariums, greenhouses, refrigerators/freezers, HVAC, laboratories, and small equipment. Key specs - Input voltage: AC 110-240 V; rated current: 10 A - Temperature control range: 50-110 C; accuracy: 0.1 C - Sensor: waterproof NTC thermistor - Display: LED digital readout - Relay: 10 A for heating or cooling devices - Enclosure size: 60 x 45 x 31 mm (2.36 x 1.77 x 1.22 in) What it delivers - Accurate temperature measurement and stable control to prevent overshoot - Simple, straightforward setup with automatic switching between heating and cooling - Clear mode indication with Heat and Cool indicators How it works - Set the target temperature. If measured temp is below the setpoint, heating activates (Heat LED on). If measured temp is above the setpoint, cooling activates (Cool LED on). The controller holds the temperature at the setpoint by switching between modes as needed. Why you’ll value it - Improves consistency and energy efficiency for fermentation, cultivation, and climate control - Wide voltage compatibility and a robust 10 A relay cover many small equipment needs - Compact footprint and easy-to-read display simplify installation and daily use Use scenarios - Fermentation chamber for beer or wine - Aquarium or reptile enclosure temperature control - Small greenhouse, seedling rack, incubator, or compact refrigeration unit