Features: With 5-speed reduction cycle This temperature Control Switch has timing function Suitable for 5V heater,12V heater, 7.4v heater This thermostat is to control the temperature for a long period of time. DC 5V ~ 15V temperature controller. Button control, Simple operation. Specification: Product name: 5V~15V temperature controller Current: 2.5 A Connector: 5.5*2.1mm/0.2*0.1in Weight: Approx.46g/1.6oz Function: Power adjustment button action output status Indicator(RGB tricolor) Turn on the power no output no indication Connect once switch 100% red light Connect again the switch 80% green light Connect again the switch 60% blue light Connect again the switch 40% white light Connect again the switch 20% yellow light Connect again the switch no output no indication