DROK Micro Digital Thermostat DC 12V -50 to 110x2103; Temperature Controller Board Electronic Temperature Temp Control Module Switch with 10A One-channel Relay and Waterproof Ultra small size: 48.540mm, light weight, handy and easy to install. Wide temperature control range: -50 to 110; High accuracy: 0.1. With waterproof sensitive NTC (10K 0.5%) sensor probe as the measuring input. Power supply: DC 12V; low power consumption: static current&lt;/=35MA;attract current: &lt;/=65MA. Equip with 0.28'' 3 digits LED digital tube, bright Red digital display,clear and easy to read.