Never again worry about over-filling your beverage glass or coffee mug. Simply hang the handy Say When Liquid Level Indicator unit on the lip of your cup or glass and pour with complete assurance.
Say When will sound to alert you when the liquid level nears the top. Convenient and pocket-sized at only 2-5/8". Uses one 9-volt battery (included).
Don't be fooled by cheap imitators! Demand only the 'Say When' brand - the Original High Quality liquid level indicator.