Quantity: 1 - Color: Red - Material: PCB board - Dual-channel detection using two thermal resistors to detect high or low temperature range. Automatically constant temperature control - Comparator output drive relay directly can be connected to AC 220V devices - With potentiometer to adjust temperature - Dual-channel sensor interface can be connected different sensors to control products meet two conditions - With 4 x 3mm installation holes easy to use - Working voltage: DC 5V - Two replay output ports can be separately controlled or serial connection meet two triggers - Great for DIY project