Features Low Noise : Enjoy a quieter environment with a synchronous rectifier design that eliminates the need for a heat sink, ensuring smooth, low-noise performance Versatile Compatibility: Power a variety of devices with ease, supporting all fans up to 12V 5A, including brushed DC motors, water pumps, and light bulbs, while allowing parallel Manual Speed Adjustment: Easily customize performance by adjusting the resistance on the board, giving you control over fan speed based on your specific needs Features: 1、LOW NOISE: The DC speed controller adopts the design of synchronous rectifier converter, no need to add a heat sink under high current , the output is glossy direct current (no pulse), direct drive output design, low noise 2、FANS within 12V 5A: The DC speed controller can support all fans within 12V 5A, including brushed DC motors, water pumps, light bulbs, etc. Multiple fans can work in parallel under the premise of not exceeding large currents 3、MANUAL SPEED CONTROL: The DC speed controller can be adjusted manually by turning the adjustable resistance on the board 4、4 TEMPERATURE ZONES: The DC speed controller has 4 temperature zones automatic temperature control and variable speed function, which will automatically take effect after plugging in the temperature control probe 5、DIFFERENT SPEEDS: The DC speed controller will work at a low speed at the manually adjusted speed when the temperature control is working, while the high speed is 12V straight through, and the speed in the middle of the temperature zone will change linearly 6、WORK MONITORING FUNCTION: The DC speed controller has a channel work monitoring function, which can support a stop monitoring alarm with a speed line (such as a three wire fan), and an ble and visual alarm when the speed is lower than 450 rpm Specification: Item Type: DC Speed Controller Material: Plastic Working Parameters: 12V 5A Board Size: Approx. 50 x 48mm / 2.0 x 1.9in Package List: 1 x DC Speed Controller Note: Product with Temperature Probe and Buzzer, No Need to Purchase Separately Package List 1 x DC Speed Controller