brand new and high quality Quantity:1PC Color: as picture show Size: 48mm*40mm (L x for W) Feature: Temperature control range: -50 ~ 110 Resolution: 0.1 -9.9 to 99.9 when other temperature ranges 1 Temperature measurement accuracy: 0.1 Control accuracy: 0.1 Backlash accuracy: 0.1 Refresh rate: 0.5 S Input Power: for DC 12V Measuring inputs: NTC (10K 0.5%) Waterproof sensor Environmental requirements: -10 ~ 60 Humidity 20% -85% Power consumption: Static current: 10MA pull current: 65MA How to use Connect the power supply and the load, you can supply to the controller Is displayed as a measured temperature Press the Set button , the display flashes the temperature Press + - to see the desire temperature After setting press set to confirm return The controllerautomatically performs the relay by setting off ! Lights, LED status descriptions: Indicator: Off the relay is switched off , for always indicate the relay is closed LED: Shows LL is the sensor open, showing HH is of range, the thermostat will be forced to close the relay, the display---as high temperature for protection Parameter Function: Long press set 5 seconds to enter the main menu setting, press the + / -toggle PO ...PS long SET or 10 seconds of no for key activity confirmed their return to the controller Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!