The EK-Quantum Scalar Flow Indicator is a high-quality GPU-mounted flow indicator with addressable D-RGB lighting. It visually represents the coolant flow rate, which can often be difficult to see with the naked eye. This can be very useful for quickly determining whether your loop is functioning properly or if there are issues with the pump or flow. It features dedicated G1/4" inlets and outlets. It is essential to connect the labeled ports correctly. This product is compatible with the common RGB synchronization technologies of all major motherboard manufacturers. The anodized aluminum cover conceals the LED hotspots and ensures even lighting. Enclosed: EK-Quantum Scalar Flow Indicator Bottom-Top D-RGB - Black G1/4" nickel-plated brass plug x 1.