Specifications: This advanced device is for controlling temperature in aquariums. Use in seafood machines, terrarium, vivarium, chicken incubator, etc. Wide temperature control range. Dual heating and cooling function. Temperature measurement function. Large and clear LCD display. Mini and light weight design. Easy to install, simple operation. Instructions: 1. Press UP button to show the starting temperature. 2. Long press UP button the temperature to display flashing. 3. Press UP/Down button to set the temperature value. 4. Press Down button to show the stop temperature. Type: Temperature Controller Case Material: ABS Power Supply: 12V/220V (Optional) Temperature Measurement Range: -50 ~110℃ Temperature Control Range: -50 ~110℃ Temperature Control Precision: ±0.1℃ Measuring Input: NTC10K, L=1 Meter Waterproof Probe Size: 6cm x 4.5cm x 3.1cm/2.36'' x 1.77'' x 1.22'' (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(with Probe)