Beep and Vibrate Liquid Level Detector

An essential assistive aid for the blind and vision impaired
Great for both hot and cold beverages – beeps and vibrates when liquid reaches the top of a cup or glass
Adjustable probe height allows you to detect 6 liquid height levels
Convenient built-in magnet allows you to attach detector to refrigerator door
Powered by 1 CR2032 battery (included)