1. DC 8-60V wide operating voltage range (here refers to the control panel can work in this voltage range,the actual operation of the controller power and fan is together, it must be in accordance with the fan power requirements, otherwise it will damage the fan). 2. Dual independent temperature control, in turn show the temperature of the two channels (-9.9℃ to 70.1℃, error Less than 1℃) 3. Fan low speed and temperature control zone are set by key, flexible control, set a large range, set the program after the save. 4. Can set the switch stop alarm function (external AC buzzer long, the default off).<br><br>Operating voltage:DC8-60V (must be equal to the fan voltage, if you use 12V fan is powered 24V will burn the fan) Operating Current:Control Panel Operating Current 35mA (12V) 22mA (24V) Control capability:no fan current limit, but the board fan interface pin current should not be greater than 3A current,use a larger current fan Please connect the fan power cord directly to the main power supply! Control output range:10%-100 (this is only the signal output range, the actual situation depends on fan performance) Temperature probe specifications:NTC 10K B = 3950 Temperature measurement:-9.9℃ to 99.9℃ error 2℃ (1% probe 70 degrees Celsius) 3℃ (70 degrees Celsius above) Temperature range:Acceleration temperature 5℃-94℃, full speed temperature 10℃-99℃ Speed measurement:10-9990 rpm, more than this speed is always displayed 999, resolution 10 rpm, the display unit is * 10 rpm (speed measurement in accordance with the common 2-pole signal fan design,the vast majority of fans are 2-pole signal) Stop alarm speed:less than 375rpm Note:Due to different production batches, the appearance is different, which does not affect the use. Colour:Green Material:PCB+electronic components Size:Circuit size:65mmx65mmx15mm, positioning hole center distance 56mmx56mm diameter 3.2mm<br><br>Package Contents: