Reliable Workmanship for a Long Lifespan: mainly made of quality plastic, the temperature relay switches are compact and sturdy in structure, not easy to break, to keep off water, thus serving you for a long time; The temperature are equipped with stainless steel probes, hardly rusting, having nice working performance 2 Modes for Flexible Operating: there are 2 working modes of the digital temperature controller, one is the heating mode, the other is cooling mode; The temperature can change from minus 50 degrees centigrade to 110 degrees centigrade, and the temperature control accuracy can reach 0.1 degree centigrade, so you can adjust the temperature controller according to your actual needs Satisfactory Practicality on Occasions: the freezer temperature regulators have a wide range of applications; You can apply them to improve your air conditioning system, refrigeration system, incubation zone, equipment cooling efficiency and so on Smart LED Screen for Easy Reading: inserted with reliable LED screens, the fridge temperature controllers can display the operating temperature clearly, making it convenient to read and adjust the temperature in time Sufficient Quantity for Replacing and Using: you will receive 3 pieces of thermostat fan control switches, enough to replace your broken ones, bringing you lots of convenience; You can also share some of them with your friends to show your generosity Colour:As shown Material:plastic Package Contents: 3 x LED Thermostat Switch Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.