Dimensions: PCB board size 65x65x15mm/2.56x2.56x0.59in. Positioning hole center distance 56x56mm/2.21x2.21in. Diameter 3.2mm/0.13in. 2 Channels: Dual independent temperature control, alternately displays the temperature of the two channels. Flexible Control: The fan's low speed and temperature control's temperature zone are set with buttons; control is flexible with a wide setting range. Alarm Function: DC10-60V wide working voltage range, the switch can be set to stop alarm function. Alarm speed: lower than 375rpm. Speed Measurement: 10-9990 rpm; if the speed is higher than this, it will always display 999. Resolution is 10 rpm, and the display unit is 10 rpm. Control Capability: Not limited by fan current, but the pin current of the fan interface on the board should not exceed 3A. Item Type: PWM Fan Speed Temperature Controller Material: PCB Working Voltage: DC10-60V (must match the fan's voltage; using a 12V fan but supplying 24V will burn the fan) Working Current: Control board working current 35mA (12V) 22mA (24V) Control Capability: Not limited by fan current, but the pin current of the fan interface on the board should not exceed 3A. When using a fan with higher current, connect the fan's power cable directly to the main power supply! Control Output Range: 10%-100% (this is only the signal output range; the actual situation depends on the fan's performance) Temperature Sensor: NTC 10K B=3950 Temperature Measurement: -9.9°C-99.9°C, error 2°C (1% sensor within 70°C) 3°C (above 70°C) Temperature Control Temperature Zone Range: Acceleration temperature 5-94℃, full speed temperature 10-99℃ Speed Measurement: 10-9990 rpm; if the speed is higher than this, it will always display 999. Resolution is 10 rpm, and the display unit is 10 rpm (speed measurement is designed according to the common 2-pin signal fan, and most fans are 2-pin signals). Stop Alarm Speed: Lower than 375rpm PCB Board Size: Approx. 65x65x15mm/2.56x2.56x0.59in Positioning Hole Center Distance: Approx. 56x56mm/2.21x2.21in Diameter: Approx. 3.2mm/0.13in 1 x Module 2 x Cable