KAIWEETS portable tester is a compact brake fluid quality meter for vehicles. It is presented in the form of a small pen, has a compact size and corrosion-resistant probes. It can be used for quick inspection and evaluation of the brake system. The housing is made of durable plastic. A small display on the top shows the received data. AAA batteries are used as the power source. There is a safety system, indicators, and automatic shutdown. Fully compatible with DOT 3, DOT 4, and DOT 5.1 brake fluids. The settings system includes various presets and the ability to save data. The tester quickly checks the brake fluid and analyzes it without the need for laboratory tests