It is a daily assistive living aids for Visual Impaired Person to travel around.
It provides an alert sound and vibration when the wate or liquid reached the top of the cup or glass. Anti-slip design: built-in strong magnet for easy attach to the refrigerator and avoid falling.
It delivers 2 type s of alert sounds and vibration when reaches the Hi and Low Probe.
There is adjustable probe height. it is easy to change battery.