This water flow meter is a must-have DIY kit for computer water cooling systems. High quality materials ensure perfect durability and performance.Feature: Used to observe the water flow rate of a computer water cooling system. Avoid the pump stopping the water temperature from overheating. Made of high quality aluminum alloy and acrylic material for durability. Unique hexagonal design for multiple connections. RGB light effect. Compatible with all G1 / 4 connectors, plug and play, easy to install and use. 100% brand new, fine workmanship, ceramic bearings. Specification:Product weight: 111gSubject: TransparentMaterial: Acrylic+Aluminum AlloyInput voltage: 12VWorking current: <4AMaximum output power: <48WWorking temperature: <70oCRadiator type: Water-cooled ProductsProcess: MachiningPattern: SmoothThread: G1/4Package list: 1 * Flow Meter 1 * Controller 1 * Remote Control Note:1. The measurement allowed error is +/- 1-3cm.2. Display Er after power-on, check if the probe is connected and the contact is good!3. After setting the temperature, the temperature relay is not connected, check whether the selected mode is correct, and whether the time constant temperature function is turned on!