EASY TO INSTALL: The design of cooling indicator is novel, simple and practical, easy to install, small in size and in use. FOUNCTION: The indicator is used to observe water speed of water cooling system, in case that pump stops working and causes overheat. SIMPLE TO OBSERVED: Green impeller of water indicator is convenient for observation, normally used in computer or other water cooling systems. APPLICATION: The meter indicator made of tungsten alloy. G1/4 standard thread is widely fit for most computer cooling tubes or connectors. EXQUISITE APPEARANCE: Computer cooling indicator apart from observing water , it is also a great and delicate decoration.