9 Volt Single Level Liquid Sensor

SKU: KDNM4191-1 
    	
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    The 9 Volt Single Level Sensor is an aid for people with vision impairment to fill cups and glasses with one level of liquid.
    	
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    The unit simply hangs over the side of a cup or glass with the metal prongs on the inside of the container.
    	
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    Produces a loud buzzing 400Hz tone with slight vibration.
    	
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    A standard 9 Volt Battery plugs into the base for easy battery change.
    	
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    Comes with battery already inserted ready to use.