Discreet liquid level indicator measures 2 different levels of liquid with both a high pitched beep and a buzz. Two levels of beeping gives you advance warning as liquid nears the top of your mug or cup. Unit has 2 adjustable prong depths with a maximum depth over the lip or mug or cup of 1.3 inches. The minimum depth is 0.75".
Operates on 2 button cell batteries which are included.
* Mug is not included.