Features: 100% brand new and high quality Automatic shutdown: automatically shut down after 10 minutes Reasonable design: the pen electrode can be directly inserted into in the drinking water bottle Fast test: due to the exquisite naked type sensors, 2-6 seconds to finish a test Easy cleaning: the electrode sheath can be drawn, easy to clean the probe and jacket. Titanium alloy material reduces the magnetic disturbance in the water! With leather case, portable, small and light weight, easy to carry Wide testing range 0~9990PPM Wide application temperature: working in 0~50degree LCD screen, long battery life Reasonable design: the electrode can immerse into the aqueous solution directly; the protective cap can be regard as a container of aqueous solution! High accuracy and auto temperature compensation z