This audible liquid level indicator allows you to pour hot drinks with confidence. It alerts the user with sounds and vibrations when liquid touches the prongs of the device. Simply place the gauge on the side of a cup, glass or jug. Making a cup of tea or coffee has never been easier and safer. Battery included. Please note: For hygiene reasons the liquid level indicator is not returnable unless faulty. Features: Suitable for use with both hot and cold liquids. High and low probes with two different alert sounds. Therefore making a cup of tea or coffee with milk will be much easier. Liquid detection level adjustment – slide the metal prongs up and down to adjust the liquid level to be detected. Has built-in magnets, so the liquid level indicator can be easy stored on your fridge door.