1The for Raspberry Pi fan expansion board controls the fan speed through I2C and can display real-time temperature with heat sink set, superimposed for better heat dissipation 2This product is specially designed for Raspberry Pi, based on for Raspberry Pi 40pin GPIO interface, suitable for Raspberry Pi series motherboards. 3Using PCA9685 as the fan controller, the driving ability is strong, and the PWM temperature adjustment is more intelligent. Use 0.91 inch OLED, 128 x 32 high resolution, real-time display temperature or custom display content. 4The cooling module adopts PWM adjustable speed fan of 3007 specifications, the rotation speed is up to 8000 rpm, and the wind force is strong. Support real-time temperature reading and intelligent temperature dissipation, reprogrammable definition. 5I2C interface is reserved to facilitate the connection of other main control boards. 16 PWM output channels are reserved to facilitate external driving of other PWM devices.Item Type:Expansion board cooling fan modulePower Supply Voltage: 5V Logic Voltage: 3.3V Driver Chip: PCA9685 OLED Driver Chip: SSD1306 Control Interface: I2C OLED Resolution: 128 x 32 Fan PWM Drive Duty Ratio: 25% OLED Display Color: White Fan Speed (maximum): 8000 rpm OLED Viewing Angle: Greater than 1601 x Fan HAT11 Bag x PI4-HEATSINK-SET1 x Straight Pin1 Bag x Screw Pack