Features: Circuit load capacity: maximums current per output 5A, the bus currents up 9A Output Range: The first channel 20-100percentage, or 40% -100percentage Working voltage: DC12V Stall alarm minimum speed: 700-800rpm Temperature probes parameters: 50K B = 3950. Features: Working voltage:DC12V Circuit load capacity: maximums current per output 5A, the bus currents up 9A Output Range: The first channel 20-100percentage, or 40 -percentage, The second channel and the third channel 10% -100percentage (Note: Aboves ranges only for PWM ranges, the actual control effect will vary depending on the fan.) Temperature probes parameters: 50K B = 3950 Thermostat temperature zone error: error depending on the temperature probes, generally 3-5percentage Stall alarm minimum speed: 700-800rpm Function setting switchs Description: (No1): The lowest temperature channel PWM setting, when ON state FAN1 PWM minimum is 40%, when OFF the minimum PWM of FAN1 is20%. TP1TP2 (No. 2,3): Temperature channel control temperature zones are interpreted as follows (need to used with the temperature probes): TP1TP2 Accelerating temperature Full speed temperature OFFs OFFs 35° 45° ON OFF 40° 55° OFF ON 50° 70° ON ON 60° 90°. .When the temperature lower than the accelerated temperature, then output at the minimum rotations speed; when it exceeds over the full temperature, then alwaysoutput at full speed. BF1 BF2 (No. 4,5). .Corresponds FAN1 FAN2 stall alarm function switchs, when the corresponding openchannels fan break down,controller will alarm with soundand light (works with buzzles), alarm will automatically eliminated when the fan is rotated recovery . If BF1 and BF2 both are open (ON), the FAN1, FAN2 h. . Specifications: Material: plastic Size: approx 4.3x5cm/1.7x2inch Working voltage: DC12V Package Includes: 1xSpeed Regulator note: Please allow 1 to 3cm error due to manual measurement, please make sure you do not mind before you bid, Due to the difference between different monitors, the picture may not reflect the actual color of the item.