DC 5V Digital Thermostat Module -58℉ to 257℉ Fahrenheit Temp Display Temperature Controller Board with 20A Relay Waterproof Sensor Probe Dual LED Display Red Green

Works good. Used to control electronics cabnet temperature.

Pretty cool little thermostat, works great upon installation, and is what it says it is.... Simple no frills just a working useable thermostat. I put it in the inverter compartment on my motor coach to control a fan so as to not overheat my inverter while traveling in the 110-120 degree desert Southwest which has happened. There are a number of settings you can control. This opens and closes the negative circuit as described in the pictures section of its product page The thermostat arrived on time and in a well packaged parcel in excellent condition. I can't speak to its longevity, or durability as it is recently been put in service. If that becomes an issue I'll update this review accordingly.

Though the unit works, I’m a little confused. It says the unit works on 5vdc. After hooking it up using a 12volt battery and on a solar charger, when the battery voltage drops below 12volts the unit shuts off. If it operates at 5volts, it should still display the temp readings on the display. I’ve tested several times and sure enough, when battery drops below 12volts the unit shuts off. Hopefully someone can explain this.

Using it for a Christmas Light display controller box just to ensure the controller board doesn't over heat inside of the enclosure. Worked great.

DOA

as advertised

A very well designed module that can control temperature through a mechanical relay. Works as described.