Features: High and low temperature display, three-view window. Memory power off function. Start high temperature cooling mode: Set the start temperature value to set the stop temperature value, the relay closes and the cooling equipment starts to work when testing the temperature at the initial temperature. Disconnect relay and cooling equipment stop work when detecting temperature Stop temperature. For example: Set the start temperature to 30and 25when the tested temperature is 30, close the relay and turn on the start indicator (red). When the tested temperature is 25, the relay disconnects and the shutdown indicator light (green) is on. Start low temperature, heating mode: Set the start temperature stop temperature, when detecting the temperature start temperature the relay closes and the heating equipment operates. When detecting temperature shutdown temperature, the relay is disconnected and the heating equipment stops working. For example: Set the start temperature to 25, stop temperature to 30, when you detect temperature 25, close the relay and turn on the start indicator light (red). When detecting a temperature 30, the disconnection relay and the shutdown indicator light (green) are bright. Features: Item Type: Temperature controller Model: 1401 Selection style: 12V, 24V (optional) Temperature measurement range: -9 ~ 99 Temperature measurement accuracy: 1 Temperature control precision: 1 Refresh rate: 0.5s Input voltage: DC-12V/24V Environmental requirement: -10~60 / Humidity 20% -85% Input measurement: NTC (3950-10K 1%) Waterproof sensor Output type: relay output Display mode: digital reading Package weight: 37 g Package size: 78 * 51 * 2.5mm / 3.07 * 2 * 0.09 inch Package List: 1 * Temperature Controller